Everything is going good I am doing about a 1/4 water every couple of weeks and I have done a 85% water change a couple of times. Two of the little silver fishies died after the last water change, no idea why. The Oscars have turned into ferocious little critters, god save us if they had teeth and got big enough to attack humans. We buy 30 or so feeder guppies every couple of weeks or so and dump them in and they get eaten in like 10 minutes. Really fun to watch the oscars chase them around and engulf them. We probably feed them way too much but it is just so dammed fun to watch that we can't help it. If you hold a piece of food right above the water they will jump up to get it. The tank is higher maintenance than planned but I guess it's the price we gotta pay till we get a bigger one