Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
If you added WAY WAY WAY too much, maybe.
Seachem Equilibrium, and some GH boosters contain potassium as well as Ca and Mg.
I have never heard of over dosing the plants with K, Ca or Mg they seem just fine with lots of it (if it is in the product you used). It is true that a large over dose of one mineral may interfere with the uptake of another. Do you think you have gone way too far with the dosing?
The fish are another matter.
They regulate their body chemistry based on the TDS of the water. If there are sudden changes to the minerals or salt levels in the water they may have a hard time adjusting. I do not know how sensitive shrimp are to changes in GH, KH or TDS.