I’m wondering if anyone has any experience using gravel and crushed coral as a substrate for there cichlids? I have sand in all 3 of my tanks because that’s what they prefer. But i recently bought a power vac that works great and really makes the maintenance easier but unfortunately it sucks up the sand when I have the power high enough to remove waste. I used it on my gf tank witch has gravel in it and it worked great and has me obviously thinking of switching substrate. But at the same time I don’t want to put anything in the tank that will make my water friends uncomfortable just for my convenience. Any and all opinions are welcomed thanks.