Hello LondonDragon, Hello everyone else her, my first post, and not catfish-related.... :oops: I have a question regarding your dosing regime in this wonderful tank;: do you really add 3 times a week 0,6g KH2PO4 to a tank with 146 Litres ? If so, you would add about 8,6 mg/l (=ppm) phosphate whereas ...