Went to my local petco today to waste time, and look for to see how many people i could help. Look around an the first guy i saw waas deeply starring into the tank for sale. I asked him "getting a new tank" He said "yea" and walk away from me. So i carried on looking for someone else to help while the first guy was walking around like he didnt knew what he needed/wanted. Found someone else to help a father and his 2 kids were looking at the fish. So i started talking to them turns out they have a tank around 10gals with goldfish or koi who knows. And they were looking to buy some sort of catfish. Explain to them that they couldnt have goldfish in such a small tank/not to mix tropical fish and coldwater fish and etc. The told me thanx for the info an I carried on. found another Dad and his 2 kids buying supplies for 5.5gallon goldfish tank they wanted to make told them the basic again. Told me thanx too but still but the tank and supplies. And the other guy with kids ended up buying a common pleco and a cory cat. So out of the 3 people i help i really help none.