Zodiak246 Posted April 2, 2022 Share Posted April 2, 2022 I am currently cycling my 20 gallon planted tank. It has ADA Amazinonia as a substrate. My tap PH is 7.4 and it gets lowered down to a 6.4. if I want to add CO2 to the tank, will it lower the PH more? Link to comment Share on other sites More sharing options...
Scapexghost Posted April 3, 2022 Share Posted April 3, 2022 Probably. Could go as low as 5.6, depending on your water's hardness and alkilinity Link to comment Share on other sites More sharing options...
nabokovfan87 Posted April 3, 2022 Share Posted April 3, 2022 Mine went from about 6.8 down to about 6.0-6.2. You can also cap the substrate if you want. It's going to be something that the tank's inhabitants will have to be used to so just keep that in mind in whatever you do. Temperature, hardness, stuff like that matters a lot more than PH to me. Some species are extremely sensitive but most species will handle a pretty big range. Link to comment Share on other sites More sharing options...
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