I have a 55 gallon freshwater tank. Only paid $100 for it since it had a crack, I fixed that and haven't had any problem with that. I got about 9 or so tiger bards, a "rainbow" shark, and 3 weather loaches. Had some trouble in the beginning with some live breeding fish whose name slip my mind but they got pecked on by the tiger barbs and got ick and they all eventually died. Other than that I've had 3 tiger barbs die but have had 3 born in there so that even out. Other than that, completely fine. Had them for more year and half now. I should clean the tank more and change the filter more but the water has stayed clean and clear even tho Ive only cleaned and replaced the water a handful or times. Got an "infestation" of sorts of small snails that multiply like crazy when I overfeed but otherwise help keep the tank clean. I got natural plants too and the biggest hassle with them is trimming them or else they take over the tank. I really should pay more attention to the tank but fish getting by just fine. I'm thinking about revamping a bit with a couple new fish and other stuff. The water evaporates really fast.