It would only be a waste of vodka
Although most people think only in terms of the tank, the plumbing is actually the source of most foul water, because the molds, mildew, fungi and bacteria which cause it thrive in damp dark places, not under water. So if you want clean fresh tasting water, you need to recommssion the entire system, not just the tank and a couple of lines. Here's how to do it (and btw, it also gets rid of all the antifreeze taste and smell): Before beginning, turn off hot water heater at the breaker; do not turn it on again until the entire recommissioning is complete. Icemakers should be left running to allow cleaning out of the water feed line; however the first two buckets of ice—the bucket generated during recommissioning and the first bucketful afterward--should be discarded. 1. Prepare a chlorine solution using one gallon of water and 1/2 cup (4 oz) Clorox or Purex household bleach (5% sodium Hypochlorine solution ). With tank empty, pour chlorine solution into tank. Use one gallon of solution for each 5 gallons of tank capacity. 2. Complete filling of tank with fresh water. Open every faucet on the boat and let the water run till it smells strongly of bleach. Turn off all the faucets, but do not turn off the pump; it must remain on to keep the system pressurized and the solution in the lines 3. Allow to stand for at least three hours, but no longer than 24 hours. 4 Drain through every faucet on the boat (and if you haven't done this in a while, it's a good idea to remove any diffusion screens from the faucets, because what's likely to come out will clog them). Fill the tank again with fresh water only, drain again through every faucet on the boat. 5. To remove excess chlorine taste or odor which might remain, prepare a solution of one quart white vinegar to five gallons water and allow this solution to agitate in tank for a day or two while you go sailing and tack a lot. Keep the pump on to keep the system pressurized. 6. Drain tank again through every faucet, and flush the lines again by fill the tank 1/4-1/2 full and again flushing with potable water. Now you're ready to fill your tanks for the season. However, if you're only likely to use 100 gallons or less, fill only one tank. A key element in keeping onboard water tasting and smelling good is in USING your water...don't let it sit in the tanks for weeks. You don't want to transfer "critters" from the dock supply line and your hose to your onboard system either...the same critters that like the lines on your boat LOVE the dock supply line and your hose that sit in the warm sun. So before filling the tank each time, let the water run long enough to flush out all the water that's been standing in them so that what goes into your boat is coming straight from the water main.
