I have just put in a angelfish and 2 crabs,iv already had my shrimps for a few months now but when i put the angelfish in they went hypo and now are on last legs..... iv had a crab in there and they where fine? could this be water from the shop?
How many gallons or litres is the tank.
How many fish and which type.
Water stats in ammonia, nitrite, nitrate, and ph.
How long did you climatise for.
What was the ph of the lfs to your tank.