my suggestion is to keep birchir only tank.....looks for different type of birchir to be put inside....
and another tank use it for aging water.....use it when do water changing for other tank....and at the same time as a spare tank...if something happen to other tank....touch wood...it won't happen....

and another tank use it for aging water.....use it when do water changing for other tank....and at the same time as a spare tank...if something happen to other tank....touch wood...it won't happen....