Originally Posted by squidward89
the one in petsmart was 22 i think and said for a 2-5 gallon tank i think...the ones in walmart i didn't look at tank size on it. if thats what it even goes by.. lol i know nothing about this.. i am VERY new to fish.
Tank size is a diff. Subject. Adjustable has nothing to do w/ tank size. Adjustable heaters allow you to set it to whatever temp you want. Some heaters (cheaper ones) only allow one temperature which is not what you want. Just read the box; if it says adjustable then it's good. If not- you don't want it.