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Add them at once

Krishs Bettas

Member
Joined
10 May 2009
Messages
422
My tabk is very low stocked about 10 so so in a 60l tank the tank is well mature. Would it be okay if i added a shoal of cardinal (15) this weekend?
 
You need to be in on the ball, if you do it. A mature filter with low stocking in a small tank still has to cope with a sudden increase to what is I imagine closer to full capacity. It is certainly doable,but there is some risk. I have some breeding tanks, some of which are 60 to 80l and I have added fish of similar size and number, but i utilised media and some of the water from a mature filter servicing a much larger and highly stocked tank, so bacteria levels were already high. I have had no problems
 
I agree with Sanj you need to be on the ball.

I think if you combined it with some regular water changes you should be good.

Say two 50% wc in the 7 days, they are only small fish so the relative waste production shouldn't be too much. Just dont over feed!
 
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