I just spent $6.99 for a small bottle of liquid fish safe fertilizer. What is the difference? What's in regular plant fertilizers as opposed to the fish safe ones? This stuff is 15-0-0. All nitrogen for green growth, no phosphorus, no potassium. I'm wondering why not phosphorus or potassium? Just curious. Hopefully the fish will provide enough fertilizer.
Carli

phosphorus isnt good for the tank, will make you have the wrong kind of aglae in the tank. Also alot of the non aquatic plant food has nitrates in it to. so always get the aquatic stuff......