Somebody asked earlier if a Purasan can be used on Lake Texoma - the answer is no. Lake Texoma is a No Discharge Lake, and is holding tank only. People ask about running the effluent through a Purasan (or any other treatment system) before sending it to the holding tank. Then pumping the holding tank out in the conventional manner, when it fills.
Yes, that can legally be done, but why? Treatment systems don't kill every single "bug" that's in the effluent. If you run the effluent through a treatment system, then send it to a holding tank, the bacteria begin to regenerate themselves and after several days, the quality of the effluent is right back to where it was to begin with, especially during hot August days.
So if you're going to add a treatment system, then pump the output from it to a holding tank and then pump out the holding tank at dockside - in my opinion, you're wasting your money. You're better off getting your holding tank in an aerobic condition through proper venting and additives, and you'll be way ahead of the game.
If you operate your boat in an area where Purasan units are allowed to discharge overboard, and your boat is 65 feet or less in overall length, then a Purasan is the unit for you. Here's a list of No Discharge Zones by state, as published by the US EPA. These areas are areas where treatment systems may NOT discharge back into the water, by federal edict.
02:42:38 PM by