Cloudy tank???? lol i guess you missed the part where i said i have a 55 gallon sump turning the tank over over 13 times per hour. Being the puffer expert that you obviously are, i would think you wouldn't compare a gsp to a 10in fahaka, I also have kept gsp's and they where very active more so than i assume a 10in fahaka will ever be. The crab is gone now,like i said i just got this puffer 2 days ago, and yesterday it had been less than 24 hours the fish had been in there when i added the crab, so forgive my fish keeping if he didnt eat it, as soon as your gsp's would have lol.