No. It just means that they can't get out.They want to segregate the fish because the clients wife is squeamish about swimming with fish. What I ment when asking about space for 8 fish is will they fight in the enclosure and if so how big will it need to be to stop this happening? I also have worries about cane toads as North Queensland has loads of them but I was told that they can't access pools without there being a slopping bank. Is this true?