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post #4 of (permalink) Old 07-30-2020, 11:25 PM
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I agree with @Leaky Filter. You may need to boost your fertilization a bit. I think you are dosing according to the Tropica label, but unless otherwise specified, most dosage recs are for low tech tanks.

I bet the calcium addition will help - although if your Ca was that low I would consider Mg as well. Do you have a GH test kit? If you do you can estimate the Mg in the water as GH is mainly Ca + Mg. Normally you want something close to a 3:1 Ca:Mg ratio.

Also, I think you could probably do with more CO2 in your tank. A 0.2 pt drop in pH is not much, to hit 30 ppm of CO2 you would look for a full pt drop in pH given water KH between 1 - 10. Dennis Wong has a good article on optimizing CO2 here: You might get some good pointers here.

Good luck!
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