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DIY Remineralisation for RO or Rain Water

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jayc

Here is my formula for re-mineralising RO or Rain water:

 

Powdered compound Grams needed:

Calcium Sulphate CaSO4

Heptahydrate (so it dissolves easily)

or Dihydrate if you can't find it, but dihydrate is not as soluble.

58gm
Magnesium Sulphate (Epsom Salt) MgSO4 37gm
Potassium Sulphate (aka Sulphate Of Potash) K2SO4 11gm
Iron Sulphate (optional) FeSO4 0.30gm
Manganese Sulphate (optional) MnSO4 0.16gm
Total weight  106.46gm

Multiply accordingly if you need to mix bigger batches.

 

Alternatively, Iron and Manganese can be replaced with a Micro-nutrient (trace element) mix of 0.46gm. Again micro nutrients or trace elements are optional, but a small amount of these minerals can be beneficial for shrimps. They will get it elsewhere if it is not added here.

 

You can either use it in powder form, adding small teaspoons to your water change until a TDS of 140-160 is reached.

OR

You can premix this in 500ml bottle of RO water, and drip it into your water change until the desired TDS 140-160 is reached.

 

If you have a TDS pen, you can check how much 1gm will raise TDS in 1L of water.

Similarly you can also test GH/KH raise in 1L of water.

 

It is very important you test this yourself, since there can be a number of variables between your mix and my mix.

 

This mix will not alter pH.

 

You will be able to find all you need at www.aquariumonlinestore.com.au    <--- Back in business as of Jan 2018!

It is getting more difficult sourcing Calcium Sulphate heptahydrate. The best source I can find is from home brew shops.

keg-king.com.au/calcium-sulphate-1kg.html - $9.75 for a kilo. This is food grade stuff. removed - never seem to be in stock.

keg-king.com.au/beer-brewing-ingredients/adjuncts/calcium-sulphate-caso4-300g.html - $4.95 for 300g.  removed - never seem to be in stock.

https://www.ebay.com.au/itm/111974621019 - $20.89 for 1kg of Calcium Sulphate

 

Alternatively, if you need a remin mix for Neocaridina or Tigers, you can replace 15g - 20g of Calcium Sulphate with Calcium Carbonate.

This will raise KH a bit.

 

http://keg-king.com.au/calcium-carbonate-caco3-300g.html - $4.95 for 300g of Calcium Carbonate.

 

 

Edited by jayc
Added new sources
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Squiggle

Wow dude, that looks very cool, you must have done some serious research for that mix, well done! :thumbsu:

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jayc

Yep, and a lot of trials, measurements and water parameter testing.

 

I've also researched Potassium.

 

I'm putting it out there that along with Calcium and Magnesium, the 3rd essential mineral is Potassium.

Potassium is not only a macro nutrient for plants, but is also essential for shrimps in low quantities.

 

Please note that you can get Potassium as Potassium Nitrate. But using KNO3 (Potassium Nitrate) will introduce too much nitrates into the tank, and that might harm the shrimp.

Steer clear of KNO3 for shrimps. 

Potassium is also found in the form of Potassium Phosphate (KH2PO4). Adding too much phosphate could lead to other issues like algae.

 

I'm doing more research on Potassium. I'll post an article in Water Parameters to go along with the threads on Ca and Mg soon.

 

Also found evidence that Potassium (K) inhibits cyanobacteria growth.

http://ag.arizona.edu/azaqua/ista/ISTA8/FinalPapers/pond%20managment%20PDF/10%20MOSTAFA%20ABDEL%20M.pdf

Edited by jayc
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Squiggle

Can't wait dude, very exciting stuff! :thumbsu:

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FishBeast

Have you done any reading on Montmorillonite powder used in cosmetics? It is 100% and food grade.

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jayc

Have you done any reading on Montmorillonite powder used in cosmetics? It is 100% and food grade.

Montmorillonite is chemically made up of hydrated sodium, calcium, aluminium, magnesium, silicate hydroxide. Sometimes Potassium, iron, and other cations are common substitutes, the exact ratio of cations varies with the source the Montmorillonite is from.

Montmorillonite or Bentonite are clays, and like most clays is great at absorbing minerals. Their absorption capacity is as much as 8 times greater than other clays.

Montmorillonite is effective as an adsorptive of heavy metals.

So while Montmorillonite or Bentonite are made up of a lot of good stuff that shrimps or fish might need in their bodies, the minerals are locked away in the clay. How much of these minerals are released is the question no one has determined yet. 

How Montmorillonite or Bentonite is beneficial to the shrimp hobby is not it's mineral make up, but it's ability to absorb heavy metals and contaminants.

HOWEVER, since its got great abilities as an absorbent, what it's already absorbed (contaminant or otherwise) will be added to the tank unless you can be certain it's pure Montmorillonite or Bentonite.

 

In conclusion, If it's primary benefit is it's absorptive capabilities and not release of those minerals, isn't cheaper alternatives like activated carbon or Purigen, Macropore better ?

 

I'll leave that question for you to ponder.

 

 

Can't wait dude, very exciting stuff! :thumbsu:

 

You bet dude.

 

Did you know that apart from Phosphorus and Calcium, Potassium is the 3rd most abundant mineral element in the body (human, animal, fish or shrimp)?

Edited by jayc
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Squiggle

I did not, but I do know you need it & bananas are a good source for us! :jig:

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BombShocked

wow, i seen it now, how shame

Edited by BombShocked

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jayc

have you looked at K2SO4.2H20 Potassium Sulphate

 

Feed Grade

 K=42%w/w min

 

i chuck it in for my stem plants

 

Umm ... that's what I am using as per the first post above. Potassium Sulphate.

K2SO4.2H20 is just Potassium Sulphate dihydrate.

The dihydrate molecules just make it easier to dissolve in water.

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smicko

Awesome write up, I like how you and a few others take shrimp keeping to the next level of understanding.

Can't wait to see what's next.

Cheers mick

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jayc

What's next?

I'm testing CRS in low pH. To see if the low pH will alter ... well, anything.

pH is about 5.5.

So far ... I'm not sure if it's my imagination ... but whites seem whiter, and I'm noticing more Pretty Legs, where they used to be plain before (I think). I can't be sure cause I have too many shrimp in the tank, so it's not like I see one shrimp change. Instead I see many shrimp, but the general impression is more pretty legs colouring up.

 

I'm continuing to adjust this RO remineralising mix a bit more ... who knows, maybe I'll release it for sale. 

Edited by jayc
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CNgo2006

What's next?

I'm testing CRS in low pH. To see if the low pH will alter ... well, anything.

pH is about 5.5.

So far ... I'm not sure if it's my imagination ... but whites seem whiter, and I'm noticing more Pretty Legs, where they used to be plain before (I think). I can't be sure cause I have too many shrimp in the tank, so it's not like I see one shrimp change. Instead I see many shrimp, but the general impression is more pretty legs colouring up.

I'm continuing to adjust this RO remineralising mix a bit more ... who knows, maybe I'll release it for sale.

Dean did a similar trial way back in very low ph <5 if memory serves and had great success.

I have my pinto project in ph 5 and they seem to be doing great.

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jayc

Dean did a similar trial way back in very low ph <5 if memory serves and had great success.

I have my pinto project in ph 5 and they seem to be doing great.

Ahh, so good to know others have tried it. I'm on the right path then.

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perplex

wow nice, so whats the difference between this and Salty Shrimp?

 

same minerials but you just changed it around abit?

 

trying to work out if i make my own or buy salty shrimp,

 

are they expensive to buy? i should just go down the road and ask

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jayc

wow nice, so whats the difference between this and Salty Shrimp?

 

The price. It's about a $30-$40 saving on equivalent weight.

 

same minerials but you just changed it around abit?

 

Salty shrimp doesn't list what minerals it contains.

Probably because if it did, you would realise you could do it yourself for cheaper.

 

I believe it's the same minerals, except I also believe my ratio of Ca:Mg:K is better.

Plus I add a little iron and trace elements into my own mix.

 

I don't think SS uses any Potassium or trace elements.

 

Note: I added trace and iron, for the plants I have in my tank specifically.

 

 

are they expensive to buy? i should just go down the road and ask

 

 

Nope, I don't think so.

Considering you can get kilos of  it at Aquotix Aquarium or Aquarium Online Store for one bottle of salty shrimp, it's a bargain.

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perplex

ok, well ill go down the road tomorrow and see how much id have to buy at once.

 

ill just leave the Iron out i think

 

you said you can put it in a bottle and drip it in till you get the right TDS, im guessing you can put to much into the bottle? and wont dissolve

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perplex

ill be giving it a try on the weekend :) got all my stuff today from AOS

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jayc

Sounds good.

 

Be sure to test one drop to see how much it increases TDS by.

Use 1L of water and add a drop.

Test with a TDS pen.

 

Then write it on your bottle.

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perplex

so far so good!

 

with in 1 week, ive noticed the CRS colour up so much more, reds deeper and whites more white, they seem to be happy :)

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jayc

That's great mate.

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BellaDragon

Thank you for this - I have needed this information for at least the last year :) Wondering why no matter what I do for my fish, they keep dying - I did my own research and came to the conclusion I am not a bad fish keeper, I just have awkward water issues to deal with & minerals are the answer :) Now to see if I can get all the ingredients to test it out :) Thanks again.

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jayc

If you have awkward tap water issues, then going Reverse Osmosis and remineralising it will go towards solving a lot of issues.

But make sure you are not adding minerals to tap water. 

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BellaDragon

Rain water is my starting point - we don't have town water here, only rain water or ground water. There is little difference between them as far as pH, gH & kH go (from previous tests) only the colour & smell is different - a lot of sulpur smell from the bore/ground water and yellow tinged. I used the bore water all last autumn & early winter (we had no more rain water by then). I pre-filter the water, I have 2 cheap large filters in a 140litre tub, one has purigen & the other runs cuprisorb (I have found detectable traces of copper from tap - old pipes+rainwater) - this usually runs for at least a week before it goes into tanks. It has taken a lot of research & questions (bugging the hell out of LFS - I'm sure they hide when they see me coming now!!), many losses and some coincidences to get to the point of figuring lack of minerals is the biggest problem. A chat to a guy at Avid Aquaria regarding guppy scoliosis and then a chat to Ben at Aquotix yesterday has pretty much confirmed the mineral issue. Previously, I had tried to add various products to the tanks but the result was never what we aimed for (ph rises/crahes, TDS rises to extreme points, gH throught the roof, etc) and too many lost fish. I recently setup a different tank for my softwater fishes and until a couple of weeks ago they were great, but now I have lost 2 Kerri Tetras & 1 Purple Harlequin Rasbora is now almost dead. All fish were added in small batches over the course of many many weeks (my system was: new fish into Quarantine tank for 2 weeks - then into display tank; buy more fish, put into QT for 2 weeks, so on & so on - 6 fish at a time). No diseases present nor are there symptoms (same as previous losses) - just suddenly, fish don't swim so well & then they die. However, because I also have a guppy tank (it was a scientific experiment that didn't work as planned & now I have softwater guppies that breed happily *sigh*) however they also suffer similar lack of ability to swim but as we also have fry, I have detected many instances of scoliosis. LFS told me it was inbreeding (possible) however others have suggested (and research papers also) that lack of minerals is a majot contributing factor is guppy scoliosis (I read an interesting paper where they were using guppy scoliosis to learnmore about human scoliosis because they can study many generations & track changes). However it was via an advertisement that I found the mineral link with scoliosis - a plaster of paris looking shell that slowly dissolves & minerilses the water. Due to shipping costs for small cheap items, I have not yet purchased, but it did lead me on the search for more information & answers and then it led me to this site :). I do have Red Cherry Shrimp & until recently they were breeding just fine - but they are now suffering too and therefore I wanted to find more answers before I lose my entire colony.

 

Sorry for the overly long response :)

Edited by BellaDragon

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Squiggle

Great to see you're doing the hard yards & finding out what is wrong with your water. If you can't get yourself an RO unit & you're worried about heavy metals then try some MetaSorb, it removes all sorts of heavy metals that are toxic to fish & shrimp. It's not overly cheap but then it will definitely pay for itself in saved lives in your water. :D

https://www.aquariumproducts.com.au/catalogue_products.php?prodID=7192

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jayc

If you are not remineralising rainwater, then yes, that's the first thing you need to change.

Hopefully your rainwater collection tanks and 140L tub are not metal. Rainwater can be slightly acidic, and is enough to corrode metal, and cause leeching of metals into the water.

 

But as Squiggle has mentioned above, MetaSorb.

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