Ok today my girlfriend went to a yard sale to check on an aquarium that was for sale...found that the people were selling a 30 gallon with 1 unknown mbuna and a 15yr synodontis cat, also a 10 gallon with 2 large angelfish :duh: We have decided to rescue all of them and the 30 gallon :Angel: the africans can go in my 125 gallon with my africans, and temporarily till i can get one of the 30 gallons set up for them the angels can go in the 20. My question is because i am not sure of the water change schedule of the former owners...and fearing OTS how slowly should i acclimate the new fish??