Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
I see several problems with these.
I'll bet the first will grow diatoms!
The others have some ammonia sources for nitrogen. This might work in a plant-only tank, but not where there are fish, shrimp or other aquatic livestock.
I see several say they contain carbonates. This is not toxic, but it will raise the KH of the tank. If this is OK, then dose a small amount and see just what it does.
My overall concern is that all these are blended products. I prefer to get ferts that are closer to single ingredients so I can adjust the dosing of N, P, K, Fe, General Hardness and Carbonate Hardness separately.
In the interest of 'waste-not-want-not' it would be interesting to try these, but the first tests should be in tanks with no livestock.