Jump to content

Fishmosy's air supply system for rack

Recommended Posts


At the request of a member, here are a few shots from my current set-up showing my PVC looped air supply.

Its based on my old set-up (see link below), but rejigged for a rack.


For those of you who are unaware, this is my rack:

Circumstances were such that I could not build the air supply onto the back of the rack until the rack was in place with tanks running. It would have been much nicer if I could have set it up first, so I encourage you to do this if you want to make something similar. I will show you the main problem later on.

A (really) simple schematic for the loop is:



The PVC loop is cable-tied onto the back of my rack system so is able to be dismantled if I need to move the rack.




The top line is joined to a Resun LP20 air pump using a rubber hose with a special joiner that can slide (in and out) and twist (i.e. rotate) - this minimizes vibration and therefore noise from the pump. I can't remember what this joiner is called, but I found it at Bunnings. Hose clamps are used to hold the rubber hose in place (for peace of mind).



Luckily I have a high shelf nearby that I can use to sit the air pump on. Remember it is very important to position the air pump above the position of the tanks so that if the power goes off, the water from the tanks will not back siphon into the air pump and ruin it. Alternatively you can use a one-way valve in front of the air pump, but having seen so many of them fail, I do not trust one-way valves at all.



Each 'rung' on the loop has a series of 4mm outlets which I use to attach air line to the sponge filters in the tanks. Details for the taps are in my 'air supply' thread (linked above). The taps can be found at specialist irrigation shops or online. Bunnings does not carry them.




There is one regret I have with this system. The top 'rung' does not reach the top of the tanks on the top level of the racks (see below). This means there is some risk that the water from these tanks could back siphon into the air supply if the power goes off. So far that hasn't happened, but the potential is there. Unfortunately it was a consequence of the rack and tanks being set up first - the rack was too close to the wall to fit the air supply around the blind that sits behind the tank. If I need to move this rack I will cut the PVC pipe and add inserts so the top 'rung' sits at the same height as the tanks.



Edited by fishmosy
  • Like 5

Share this post

Link to post
Share on other sites

That's some nice installation work there @fishmosy

Share this post

Link to post
Share on other sites

Thanks @NoGi

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Must Read SKF Articles

  • Register today, ask questions and share your shrimp and fish tank experiences with us!

    Join Our Community!

  • Posts

    • beanbag
      Another thing you can do to avoid rescaping: Just take some of the fresh soil and put it in your filter.
    • Zenplay,thailand
      Thx ^^
    • sdlTBfanUK
      Hopefully the fish has just damaged itself as you say, mine do that sometimes, although the changes in the water will undoubtedly have caused them stress and the water they prefer was the water you started off with? There are sections on this forum dedicated to fish, I used it when I decided to try a Betta and got great advice from JayC and this Betta is doing way better than any I have tried before because of all the different things I did/do this time! https://skfaquatics.com/forum/forums/forum/116-fish-keepers/ Great to hear that the shrimps are doing so well. I think it is natural for the berried shrimp to hide away when they are near to birth as it protects the newly hatched shrimps when they are born, and the babies don't move far when they newly hatched either. There would be little to gain at this stage in getting more shrimps before getting a bigger/new tank, it may even be detrimental? I admit to being lazy sometimes and not topping up the tank between weekly maintenance/water changes (disgraceful really as I keep a 1litre bottle of RO water right next to the tank anyway), in which case I end up taking out 2litres and putting back 3litres at the next change, but need to make an allowance for the fact the TDS will change. When I set up the new Taiwan bee tank I measured the water I put into the tank at the start (assuming the measuring jug is anywhere near accurate) so that is how I know there is 28litres in the 35litre tank - it is a good idea to do this WITH A NEW TANK (but with everything in the tank, heater, filter substrate etc) as it is so much easier to do at that point anyway. I did the same with the Betta tank and that has 20litres in a 25litre tank (the one you were thinking of getting at some point). Without the exact figure to put in the spreadsheet then it won't be 'accurate (can still be used to give you as near an idea as needed though)', especially on a small tank! It works to the digit with mine. Even if you empty the tank and refill it probably won't be that accurate as the soil will have absorbed some water, so best do it first fill of new tank. Your water parameters are looking good and pretty much there now so all else being well you should be able to go back to once a week maintenance/water change. I don't know much about Nitrite/Nitrate as I have never had any readings, apart from the old fish/cherry shrimp tank which has always been 50 nitrate for years, probably because there are too many fish but there has never been a problem in that tank? PURELY AS A GUESS I would think the duckweed may have caused the problem/imbalance, but that is ONLY a guess based on I used it once and swore never again, I use water lettuce now, though that isn't perfect either as the routes grow so quickly that I have to trim those every week, but still a lot easier than duckweed.  Simon
    • sdlTBfanUK
      Thanks JayC, I think it is called a Geode, that was what it was sold as when I bought it in US many years ago though it could be something else? I think it is some sort of meteorite? Hopefully, as you say, now it is removed the PH may start to drop and I have put one in some prepared water to test in a week. I will also just see what happens with prepared water left out for the same period just to see what happens with that. Simon
    • sdlTBfanUK
      Those are very good quality shrimps and photos. Simon