my question is for those that have W/D filters on large tanks 150g n up... how do you do waterchanges and at what percent? how do you replace the water without destroying your BB colonies?
calicichlid;1332784; said:my question is for those that have W/D filters on large tanks 150g n up... how do you do waterchanges and at what percent? how do you replace the water without destroying your BB colonies?