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Old 10-25-2018, 05:39 PM   #1 (permalink)
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Default CO2 in my planted tank

Help please? I've am so confused about my CO2 and Ph levels in my 65 gal planted tank. The more I read the more confused I get.
My Ph is a natural 7.8 from the tap and in my tank. I have be injecting CO2 for about 2 yrs now and still can't get it right. I just purchased a CO2 regulator/reactor and thought my problem was over. However it's not.
Here's what I have. My Ph is 7.8 without CO2 I am trying to lower and keep it around 7.0 but in order to do that I have my Bubbles at around 10 bps just to keep it at 7.0. The regulator/reactor runs until it reaches 6.93 and turns on again when it gets to 7.05. It is takes only 15 mins. for it to turn on again. I think the amount of CO2 is too much. And it only takes a little while before the Ph rises again. If I stop the CO2 the Ph would go back up to 7.8 in less then 2 hrs. I have no rocks except gravel substrateon top and clay medium underneath.
Am I thing this all wrong? Should I not try to lower the Ph so much and just add just enough to lower the Ph slightly?

Stats: Ph 7.8 without CO2, KH is 5 degrees, GH is 18 degrees. I have 8 pieces of driftwood, a fist full of peat moss in a bag. Tetras of different verity, Ghost scrimp, snails, algae eaters and a few Barbs. Lighting medium to hight. Lot's of plants. And BBA which is most challenging. Weekly or ever two weeks I do a 25-30% what water change with aged water. Ph is 7.5-7.8. Which doesn't help my Ph problem.
I stopped fertilizing but nothing seems to help or change.
Any suggestion would be more the appreciated. Thanks

Last edited by rstampa; 10-25-2018 at 06:00 PM.. Reason: miss spelling
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Old 10-25-2018, 06:11 PM   #2 (permalink)
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Default Re: CO2 in my planted tank

CO2 leaves the water as easily as it enters. When it enters water, some of it forms carbonic acid, lowering the pH. When it leaves the water, the pH rises again. If your fish aren't gasping and plants are healthy, you're adding adequate CO2.

As for the bba. It doesn't have to do with CO2 directly. CO2 doesn't kill it or anything. You'll just have to get used to it or burn the tank down. You can control it though. Lower your light intensity, weekly water changes to direct dosing of excel or peroxide. On hardscape that you can remove, take it out and spray the whole thing in peroxide, wait a few minutes, hose it down, and put it back in the tank. Clean out your filter once in a while too.

Your pH regulator will need monthly calibration btw. Sensors will drift and will give you inaccurate readings.
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Old 10-31-2018, 11:02 AM   #3 (permalink)
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Default Re: CO2 in my planted tank

Thanks for your advise. You the first person that said live with it or burn the tank. LOL I fell like that sometimes but I think I'll just do what I've been doing. Water changes and H2O2 dip and spray.
Happy Halloween.
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Old 10-31-2018, 04:57 PM   #4 (permalink)
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Default Re: CO2 in my planted tank

Amano shrimps eat BBA. You can try those if you don't have any fish that'll eat them.
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Old 11-01-2018, 07:17 AM   #5 (permalink)
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Quote:
Originally Posted by mistergreen View Post
Amano shrimps eat BBA. You can try those if you don't have any fish that'll eat them.
Shrimp don't touch the stuff. Mollies nibble one in awhile but not enough to control any of it.
Thanks for you suggestion.
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Old 11-02-2018, 01:44 PM   #6 (permalink)
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Default Re: CO2 in my planted tank

true SAE (siamese algae eaters) eat bba but you really need to address your co2 issues first. you say you have medium to high lighting. if so, you really need to drop your pH to at least 6.8. you also need to add ferts to the water column. you need to balance co2 injection rate with surface agitation. check out Dennis Wong's site https://www.advancedplantedtank.com/. read "co2 fine tuning" under "in depth topics". his site provides invaluable information for planted tank enthusiasts. he also has a number of videos on youtube.
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Old 11-05-2018, 10:40 AM   #7 (permalink)
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Default Re: CO2 in my planted tank

Thanks miles, for the information. The web sight link you attached is great. The information is complete and easy to understand. Thanks again.
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Old 11-17-2018, 01:08 PM   #8 (permalink)
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Default Re: CO2 in my planted tank

advancedplantedtank.com is an outstanding site. I plan on spending a lot of time there in the near future. A 40 minute look suggests that it has a lot to teach and I have a lot to learn. Thank you, thank you.
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