has anyone had any dealings with a Pop-Up pond? i was thinking a botu getting a 45 gallon one for my brother for his birthday. I am gonna also get him teh filtration for it and a couple goldfish. in the WInter we can put the goldies in Our 55 gallon tank because by then all the fish will be big enough. We wotn set it up until summer though. I was gonn aget him 2 goldfish so as to not have a HUGE bioload