So I just got a bag of Eco-complete (EC) and I got it strictly for my 10 gallon tank that's used as a green house. It carries a baby guppy 3 snails ( 1 adult 2 babies) and a shrimp ( I forgot it's name). Now I no they create waste, but I read somewhere online the other day that it could be used as fertilizer. Is that true? Should I not clean out the tank if that's the case? I mean I do change out the water but not to much just the usual 1/4. I was thinking on removing the subtrate that I have in my 55 gallon and replacing it with the Eco-complete too. Please let me know if this is ok??