Jump to content
Sign in to follow this  
Sprae

Fluctuating pH in planted tank

Recommended Posts

Sprae

Hi guys, I've noticed that my tank pH is 5.8 during the day but goes higher to 6.0. Is that normal?

As many of you know, I have loads of moss and an anubias on a driftwood.

Share this post


Link to post
Share on other sites
fishmosy

Completely normal. Its all to do with CO2 (carbon dioxide). CO2 reduces pH because it forms a weak acid when dissolved in water. During the day, your plants use up CO2 for photosynthesis, thereby increasing the pH by removing some of that weak acid created by the dissolved CO2. Overnight the plants release CO2 instead, causing a reduction in pH.

Also remember that since shrimp tanks are often low in minerals, and also in your case already acidic (pH 5.8 to 6.0), it doesn't take much change in CO2 (or any acid for that matter) to cause a large change in pH because there are few mineral ions to buffer against the acid.

Share this post


Link to post
Share on other sites
Sprae

Thanks fishmosy. I have lights on from 2pm-10pm (8hrs) so photosynthesis in that period should raise my pH?

Share this post


Link to post
Share on other sites
fishmosy

Absolutely, i wouldn't be surprised if you noticed a difference in pH in as little as 1 hour after your lights come on, depending on the accuracy/sensitivity of your pH test of course (e.g. Digital pH meter vs. pH colour indicator)

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
Sign in to follow this  

  • Must Read SKF Articles

  • Join Our Community!

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

  • Posts

    • sdlTBfanUK
      I may have missed something but aren't the parameters you quoted for Bee shrimp, but these are cherry shrimp??? Hopefully with only 2 shrimps they will survive the cycle as 2 won't make a lot of ammonia! You should try and cool the tank a bit as JayC states, you are pretty close to the limit. With Cherry shrimp you can use dechlorinated tap water, I do. The IDEAL parameters for cherry shrimp are, PH 6.5 - 7.5 TDS 150 - 250 GH 6 - 8 KH 2 - 4 Don't get too fixated if one isn't exactly in this range (ie your PH should be fine, same as mine) or where you want it, as cherry shrimp are fairly adaptable, but if you get measurements we can check those for you and let you know whether any action is required? Mine live with nitrates of 25-50 for instance, and have done for years - I am not saying they should, just that they can live outside perfect parameters. Again, if you are using tap water it is unlikely ALL the parameters are good but the thing to do is not try and get EVERY one right, especially with tap water, and if you do want to change something do it VERY slowly! Tap water is also unreliable, every time I test mine it is different? The only way around this is to use RO water and shrimp mineraliser, but I have kept mine in tap water for 5+ years ith never a problem so unless the tap water is way off I would carry on with the tap water. If you let us know the parameters we can check if it is likely to work longer term? Welcome to shrimp keeping and this forum! Simon 
    • jayc
      And Crabby covered all your additional questions here.  Great tag team!👍
    • Crabby
      No you shouldn’t, this is what is naturally good for the tank, not a chemical. Yes, mix beforehand then add. Do this weekly if possible. And if you can, purchase the api GH/KH test kit, and/or a tds pen.    Sorry I didn’t see that you had posted the same message on two different posts, jayc covered mostly the same stuff as I did. Except better of course 😉
    • Crabby
      Hey Brando, How long has the tank been set up? You said you have had shrimp for 2 days, dosed fluval cycle 3 days before that... Sometimes people can get away with using those products for fish, but it’s not good for shrimp. They don’t produce much ammonia, but they like an ‘aged’ tank. This means it has lots of tiny little creatures, absolutely microscopic, that the shrimp can eat. Along with those an aged tank will have lots of ‘biofilm’ which is what it sounds like - a biological film, and shrimp love to eat it! A shrimp’s diet consist primarily of these micro fauna, biofilm and algaes. And a 5 day old tank will barely have any of those. Since you have already got shrimp in it though, I’ll give you advice for what to do now. If the shrimp have no fishy friends they will frolick around, swimming and diving as you have noticed. This is good, it means they feel safe.  Your parameters are okay for Bloody Mary shrimp, not perfect but alright. Can you test tds or KH and Gh? Your ammonia and nitrate are a bit high, should always be 0. This is another thing that would be different if you had waited properly. In terms of ph you may want to reduce that. Temp is fine, maybe a little high, aim for mid 70s if using a heater. Can we see a photo of the tank? Thanks for joining the forum Brando, looking forward to seeing your tank improve and mature.    post note: sorry if I came off as a little abrasive, that wasn’t intended. Just trying to be clear.
    • Brando
      Hi group, i am a new shrimp keeper and have had 2 Bloody Mary shrimp for 2 days now.    I used Fluval Cycle(bio booster) for the first 3 days because that’s what is set to do on the bottle. This was used before I got the shrimp. my Temperature is 82, ph is 7.6, ammonia is 0-.25ppm , nitrite 0, nitrate 10-20ppm.  Are these levels fine? I am new to hobby!    my shrimp randomly swim up to the top and along the glass then dive down to rest/eat. Is this a bad sign they are stressed?   please leave any tips or input!  
×
×
  • Create New...