I have trued on a fish only and it looks cool but is can compact fast. and it is hard to clean it up from all the pollution. I had to clean the sand with fresh water foe like two weeks just to get it clean. then had to seed it and wow it took too much time.
the biggest problems are too much iron in the sand and it will clog up you pumps and destroy them. it was cool to try but would never do it again. The sting ray and flounders loved it..