I was looking at your site today and noticed how often the question of tank mates and fish compatability is asked. In nature fish species are abundant and are found living in close proximity to one another. We generally don't mix species in aquariums because of our inability to simultate the natural environment. I've mixed about everything in the 20 years I've been keeping fish. You need to know bigger fish eat smaller fish and water consistency is more important than ph, hardness, and temperature. Any fish species can be mixed with any other in an aquarium if the tank is large enough and is well maintained. See pictures of my tank at
www.oscarfishlover.com/social-network/ph...bumid=67#photoid=228
as proof. This is a large established tank that's been running for over a year. It has massive filtration, frequent water changes, and timed feedings every 4hrs. Tank inhabitants are from all over the world, see list below
South America
1 - Red Oscar 12"
1 - Albino Oscar 12"
1 - Breeding Angelfish pair Gold and Black Lace, palm size
1 - Adult Blushing Angelfish, palm size
5 - Baby Silver Angels from spawn in tank, quarter size
12 - Cardinal Tetras
4 - Bloodfin Tetras 3"
North America
1 - Longear Bluegill 6"
Africa
1 - Red Empress Cichlid 5"
1 - Blue Ahli Cichlid 4"
1 - Yellow Lab Cichlid 4"
1 - African Brown Knife 7"
Asia
4 - Tiger Barbs 3"
1 - Clown Loach 4"
Australia
1 - Bosami Rainbow 4"
1 - Turquoise Rainbow 5"
Others
1 - Common Pleco 14"
1 - Common Pleco 6"
1 - Guppy 3"
Key success factors.
There is an invisible divider length wise across the tank to seperate the front of the tank from the back of the tank. The community species are kept in the front and the aggressive species in the back.
2 canister filters and 2 biowheels in the back, 1 canister filter in the front. Water flows under and around the divider. Filters pull from one section and empty into the other. This creates very good water circulation.
76 degree constant temp and frequent feedings to reduce aggression. Use an inexpensive low protein food such as Wardly pond pellets and Tetra goldfish flakes. Nevermind it is not marketed as food for these species. I find it keeps the water clearer and avoids bloat which would otherwise be a problem with this many feedings.
Water changes and gravel vaccuum are a must. I change 10% to 25% every weekend.
Keep fish you like and do your tank maintenance at least biweekly. You'll love the results and everyone else will too.
http://www.oscarfishlover.com/social-network/photos/photo?albumid=67#photoid=228