so my parents recently bought a 75 gallon tank for me for my birthday. we just redid the floors and my mom is worried about 75 gallon being on her new floors. my dad doesn't want me using a canister filter because it may leak without us knowing for awhile and he suggests an undergravel. I was planning on having a sand tank because of the looks and I know that an undergravel wouldn't work. he is also opposed to HOB for some reason. the tank will probably have a couple messy fish in it and I was curious if anyone had any suggestions