Hi there I just recently upgrading from a 29g to a 75g, when I had my 29g up and running I was slightly overstocked (1 ryukin, 2 comets and 6 danios) and remedied this with overfiltration (Fluval C4 Power Filter), a 3gal water change a day and a 50 Percent water change weekly. I now have a 75g which is currently housing 1 Ryukin, 1 Moor, 1 Fantail, 1 Oranda, 11 danios, and 1 small comet I will be finding a pond for once the weather worms up. My question... I had a perfect maintenance schedule in my 29g and the water was immaculate, now that I have a 75g that isn't nearly as overstocked, how often do you think I should be changing the water? I'd like to keep up with a small water change a day and a bigger one every week, as that seems to keep all of them very happy, however, I'm not sure how much I should be changing a day or weekly now, and if there would be a better maintenance schedule. What are your thoughts on this?