I set up my little gankpike 12 gallon tank a almost 2 months ago and have been really patient getting everything going and only added some nassarius snails and blue leg hermit crabs a couple weeks back. Water and everything was still testing good(had the benefit of gifted live rock from a healthy tank to start). Looked at the tank this am and noticed the seal(?) on the wall dividing the tank from the filtration area failed. I had placed a mini wave maker on that wall so I'm guessing this may have been the cause of the failure. My question is this a design flaw of this tank or is it a bad idea to put the wave maker on that wall? I'm thinking the buy cheap but twice adage applies here but I don't want to repeat the mistake with a new tank(considering a fluval 13 gall)