I know my local petsmart has 75's and 125's. I think I have also seen a 150. Petsmart is where I bought my 75. It ended up having a defect in the sealant, but they were very good about replacing it. They even offered to pay for any fish I lost in the move(thankfully none). I don't know if they will order tanks though. I asked about fish and they said no, but aquariums might be different.