What are you hypo'ing? What benefit are you expecting to gain from it? I seriously doubt that it would perform well enough to justify putting it in there. When I went through hypo what I REALLY needed was a place for the biological filtration to take place. I ended up putting dry base rock in there and letting that seed so that it would be able to carry some of the bioload for me. I still needed to do frequent water changes, but the fish came out of the process super healthy so it was worth it.