Well I found out that it was the CO2 cylinder that fell over, yanking the line off the bubble counter. The bubble counter just started emptying the tank on the floor. So I am still cleaning it up, but at least the tank is still structurally safe
No coasters .. I have the tank on 4x4 cedar lined with plastic from banana boxes I get from work. There is white paper towel under the tank to check for leaks.
The cleaning is a chore. The bottom section is at grade with the drain so it is all manual. Keeping that bottom section stocked to a minimum is best. The top section is not a problem... but when you only have an 85 gal water heater you have to bi-pass that to supplement the plants. That = cold well water going into the tank. If I could, I'd get a tankless water heater but that is not an option the moment.