Hello. I have a reef tank in place for 3 months and I have a small issue: I do water changes every week, but after 4 days of thriving, my corals retract and only survive in the last 3 days before the next water change, and so on...
I mentione that all may water parameters are ok-ish. Nitrate - not detectable, PO4 not detectable, pH 8.
I have 2 pavona, 1 kenya tree, 1 xenia, 1 green star polyp, 1 discosoma. 20 gallon tank, external filtration (canister with Purigen, Matrix and sponges). No fish, only 2 snails... I feed corals 2/week and Aquaforest Power Elixir 2/week. I don't measure dKH... maybe that's the problem...
I mentione that all may water parameters are ok-ish. Nitrate - not detectable, PO4 not detectable, pH 8.
I have 2 pavona, 1 kenya tree, 1 xenia, 1 green star polyp, 1 discosoma. 20 gallon tank, external filtration (canister with Purigen, Matrix and sponges). No fish, only 2 snails... I feed corals 2/week and Aquaforest Power Elixir 2/week. I don't measure dKH... maybe that's the problem...