If you want to keep the Oscar I would suggest that you get a 6ftx18inx20in 125gal. That would make a decent forever home a single O.
Water changes really depend on tank size and occupants. That 22 with all them fish should be getting 75% every day, if not more.
I grew my O in a 55gal till she was about 7 inches. I started with weekly changes of 75%. As she grew I changed the schedule due to her putting more rubbish back into the tank. At 3in it went to 75%every 3rd day. By time she was 6in it was 50% every other day. Mind you that was just her and some Roseline sharks.
Cichlids are very messy eaters if you have not seen for yourself already. The sharks did a lot if cleaning for me but still have to get down in that gravel every water change. You see all them crumbs that fly out if the O's gills as it eats. Well that just settles on the bottom and is what causes the water to foul so much faster than say a same size tank full of tetras.
If you want to keep the Oscar I would get the 6ft tank asap. Rehome everything else. And do 50% water changes every day till you do. At 8in that O already passes poop bigger than a grown neon tetra.
Check out Craigslist, Offerup, Letgo can find deals all the time. I got Toni's tank from Craigslist for $200. It's a TruVu acrylic 6ftx18inx20in tank, stand, lights, some rocks.
Water changes really depend on tank size and occupants. That 22 with all them fish should be getting 75% every day, if not more.
I grew my O in a 55gal till she was about 7 inches. I started with weekly changes of 75%. As she grew I changed the schedule due to her putting more rubbish back into the tank. At 3in it went to 75%every 3rd day. By time she was 6in it was 50% every other day. Mind you that was just her and some Roseline sharks.
Cichlids are very messy eaters if you have not seen for yourself already. The sharks did a lot if cleaning for me but still have to get down in that gravel every water change. You see all them crumbs that fly out if the O's gills as it eats. Well that just settles on the bottom and is what causes the water to foul so much faster than say a same size tank full of tetras.
If you want to keep the Oscar I would get the 6ft tank asap. Rehome everything else. And do 50% water changes every day till you do. At 8in that O already passes poop bigger than a grown neon tetra.
Check out Craigslist, Offerup, Letgo can find deals all the time. I got Toni's tank from Craigslist for $200. It's a TruVu acrylic 6ftx18inx20in tank, stand, lights, some rocks.