Originally Posted by CAPTJOHN
I have crushed coral for my sub. thinking of switching to all sand. would this help.?
In one word....YES. I like the look of crushed coral too but it forms pockets that trap uneaten food and other stuff. I had pretty much the same setup for my first tank but changed to sand before i even put one fish in.
I would sugget changing the substrate but be careful. You are going to stir up all the stuff in the crushed coral which might cause a mini cycle. I would get as much of the coral out as I could and then do a 50% water change. Be ready to do a HEAVY water change for the next couple of days. Don't worry about getting it all out, just most of it. The rest will work its way to the top eventually. I would also dose with something like microbactr 7 from brightwell aquatics for a week or so.