elisew
I don`t count sheep to get to sleep, I count fish
There's no right or wrong answer, it's best to have some form of back up plan though if things do go wrong, if not you're better off just not taking the risk.
+1
Also please remember that most lfs will tell you anything and everything just to make a sale, we here on the forum do not have an interest in making money from you, we just want to help you make sure your fish live as healthily and as well as they can......even if it means telling you that your thoughts/ideas are no no`s