HOLLIEO
Aquarium Advice Freak
I have divided part of my tank off to try and breed my Zebra Danios. I read to put marbles at the bottom of the tank, so when they lay the eggs they will fall where the parents can' t eat them right away. I had a jar full of river rocks that I bought at the craft store, so I used those instead of marbles. Will this be okay? Will this cause my levels (Ph, Nitrates, etc) to go out of wack and is this harmful to the fish?