I am soon to be acquiring a new 30 gallon tank, and was planning to put a few apistrogramma in it, along with some angelfish. Currently I have a smaller tank running and was wondering if it would be safe to move my Kuhli Loach into the tank, which would have sand rather then gravel which I believe he would prefer. Is it safe to mix loaches with Apistogrammas or Cichlids in general? Or is that an accident waiting to happen?