Hi I have two fancy goldfish (an Oranda and a Ranchu) and they are thriving. I am wondering if I am over filtering their tank. I have some live plants (anubia, Java fern, Crinum Calamistratum, and moneywort). My current filtration is a small Aquaclear 20 which is filled with a sponge filter, 2 plastic pot scrubbies and filter floss and I have the large aquarium coop sponge. I am also running 3 airstones. I am just curious if I could get by with the just the sponge filter or no? Thank you in advance