I'm at the store buying a QT tank about to introduce some new fish into my newly cycled 10g that currently has 2 ADFs and 1 platy. I plan on starting with adding a gourami and another platy to the 10g after they've been quarantined. Using the aqadvisor aquarium calculator, I was warned about adding additional filtration with this stock. I also want to add a small school of neon tetras (4 or 5), and adding another filter into the equation allows for adequate filtration capacity for this 103% stock level (with the tetras). Do you think adding additional filtration is a good or bad idea to accommodate for the bio load in a slightly overstocked tank? And yes, I plan on making the necessary water changes. No, I can't upgrade tank size at the moment, I live in a small apartment :/. Furthermore, do small filters use lots of power? My boyfriend is concerned about adding to the electricity bill, and overloading the outlet. we just added a surge protector after losing power from 3 outlets and blaming it on the aquarium. Your advice is appreciated.