+1, Zeovite sponge power. I have tons of non-photosynthetic sponges in my tank and I feed sponge power each day two drops per day in my 75 gallons along with amino acid.

Thanks guys. And this powder can be used stand alone?

It's not a powder it's a liquid in a little bottle. It's pretty expensive but since you only use 1 drop per 25 gallons it last for a very long time, even in large tank.

cool, thanks for the info.

im probably just gonna set up a 10-20 gallon tank specifically for growing sponges..... then feeding them manually to my moorish idol

Do a little googling on cryptic refugiums, lots of good info out there!

thanks. ill do that