Join Date: Mar 2018
Location: Philadelphia, PA
CO2 and PH Fluctuations
So I just (yesterday) started dosing CO2 into my first planted tank. My animals show no signs of stress, and my CO2 indicator solution is calibrated to 4 dkh. I have 2 questions, one regarding CO2 and PH fluations that I am seeing and one regarding nitrogen/phosphates...
1) Without CO2, my PH is between 7.5 to 8, with CO2 at approx 5 bubbles per sec, my PH drops to about 7 or maybe slightly below 7. I have only RCS, amano shrimp, and ottos in my 16 gallon tank at the moment. Are these big daily swings in PH harmful to my animals? I see no signs of stress and they are doing work on my current algae issue, but I am worried about their molts/fry. Also, I've been checking my PH since I've turned on CO2, that is yesterday and today. Yesterday I was getting the same PH reading and added about 75% of the recommended dose of Seachem Alkaline buffer to raid the PH and GH. I'm still getting the same reading today while CO2 is on, despite having added Seachem Alkaline buffer yesterday. I need advise, should my tankmates be fine as is or should I try to raise the PH above 7 with more Seachem Alkaline buffering agent (I nearly killed my animals once by adding too much buffering agent when I gave the fluval CO2 kit a try, but the rate was uncontrollable and I opted for a complete setup)?
2) On the first day of CO2, I did a major 50% water change beforehand, and afterwards added the recommended dose of the following Seachem products: Nitrogen, Phosphate, Trrace, Iron, Excel. Right before my lights were scheduled to turn off, I took a long look and there was noticeable growth in just the first day. Today I've noticed almost no growth, that is, the growth I was used to seeing before the addition of CO2. My gut feeling tells me to dose nitrate and excel daily from here on out, but I've yet to figure out or adopt any kind of dosing strategy. Advice on this matter would be appreciated.