taking into consideration that you just doubled your bio load i would be doing loads of frequent water changes like 20% every other day which is only one 5 gal bucket.
was the fluval 4 you added an additional filter and was it matured from another tank or not.
also leave the oscar it will be a good distraction.
dixon
was the fluval 4 you added an additional filter and was it matured from another tank or not.
also leave the oscar it will be a good distraction.
dixon