haha my parent's flipped when i told them about how much i'll be spending on just lighting alone. Lol surprisingly they have given in. At first i told my parent's my puffer will outgrow his 20 gallon in one year. Two month's later i told them he is now two big for it and will need a 30 gallon. They said they will not get me a big tank at the beginning. Now they've ok'd the 46 gallon that i will be getting. So far they've been pretty much against everything that i have wanted and have slowly become cool with everything. LOL heck my dad even helps me with my skimmer when it goes out of whack, and my mom helps me with my filter (which just died) when it goes out of whack as well. So i think i've slowly started them into liking the idea. I think my dad might like "playing with the new toys" when i get everything going. So maybe you're right and i'll be able to talk him into a ro/di unit.