Review on 🧴 Thetford Blaster Holding Tank Cleaner Pouches, 1.6 oz., White - Pack of 4 by John Talcott

We don't travel so tanks don't have to worry. I have used tank cleaner on black and gray tanks with Horst Miracle Probes installed. The black tank requires 3 backwashes as I have full flow hose splitters installed and 6 to 9 backwashes with 1/4" ID hose splitters installed. The gray tank is stuck at the 2/3 full mark if the bypass valve is left open. I have both tanks made to the instructions and no change with the touch lights so I backed onto both tanks and still no change I don't think the enzymes can work in a few hours but if they can for a few weeks or months if omitted, they will likely empty most storage tanks.