So i setup my drainage layer to have 2" of space for water. I used egg crate with pvc holding it up then i put double window screen and my substrate. I setup my viv a little over a month ago and drained it today it had about 3/4" of nasty brown water down there that stunk terribly. Can that cause any problems with frogs? Also o had probably 1000 springtails in it that were still alive. Any ideas on how to keep them from going down there?