Adding more corydoras

[Lurcher]

Could you please advise me,i have a large planted tank,L40”xw16”xH26”.approx 260 litres with EFX400 external filter.W/C=30%per week ,all parameters good and varied diet daily.tank contains ,3young Yoyo loaches,6bronze corydoras,6peppered corydoras 12 cardinal tetras and 1sae.i know of 12 bronze corydoras which are neglected and i can obtain.i want to give them a better life and my question is ,will my tank be large enough to add them? I would quarantine them for 1month before adding.i could transfer the 12 cardinals to another community tank if i need to.any help from you guys would be gratefully received. Thank you.

[Shane]

Your tank is roughly 68 gallons. I do not think many of us would consider a 68 gallon tank with 24 Corydoras, 3 loaches, an SAE, and 12 small tetras remotely over stocked. My only suggestion would be to up your water changes to 40% for 2-3 weeks after adding the new fish. This will allow your filtration time to adjust to the increased bioload.
-Shane

[Lurcher]

Shane thank you very much for your help.