hi i have have a secondhand juwel rio 125 tank can with these fish chinese algae eater,male swordfish,buenos aires tetra, glowlight tetra, 2x pearl danios what other fish do you reccommed ? i like tetras & corys going to local aquatic shop on monday how many fish can i add at one time ? thinking of 6 tetras and 3 bronze corys & 3 peppered corys .i check water conditions every week ph 7.6.nitrite 0.0,nitrate 25 ,gh >16d kh 6d, ammonia 0.00 temp 76-78 f thanks for any replies