Ok, so the other day my family purchased a Dwarf Gourami, a Platy Wag Sunset, a Marble Molly, and an African Dwarf Frog. What is the minimum size tank you recommend for all those guys? They only bought a 5 gallon tank which I knew was way too small for all of them but they insisted; and my dad wants to go back and get an algae eater as well. I'm going to take it upon myself to buy a bigger tank and I just want to know what size would be best. Is 10 gallons good, or should I go larger? Thoughts please, and tell me anything else I should know to properly care for these guys.