water conditioning equipment or chemicals?

Yes, there are "pills" you can use, however I don´t know how good they are in warmer waters. Better is to use a watermaker and produce smaller quantities and you can also have a UV-filter in addition to normal particle filters. The UV-filter is like a steel tube with a UV light-tube inside, to kill certain bacterias I guess. You can probably find a lot on this with a little Googling...

I'm with AMG on this one. I would not want to drink water thats been tanked for that long, unless its gone through a purification process which can be done as you ask above. A large water tank that is depleted over a long period makes in-tank chemical dosing awkward... the amount of water in the tank at any time and the amount of dosing at that time and the length of time the remaining waters left in the tank etc gives a rather hit and miss approach. Taste direct from the tank is questionable too, depending on the tank material and the chemicals used.
Filtering the water between tank and user is far more consistant and gives a more natural taste.
Apart from space / cost / power draw / maintenance / down-time, a desalinator has several advantages. It provides a constant supply of fresh water on demand which combined with a water tank correctly sized, can supply ample fresh drinking water / basin / tiolet / shower / bath / deck wash water etc on a daily basis, but keeps the dead-weight of the water you carry on board down and at a more constant level. A smaller tank topped up more often, can provide more water more often than a large bunker tank if the system is set up that way.

An Ozone bubbler installed in the tank rather than using chemicals works to, though I would still use filters both partical and chacaol as well as a U/V filters as mentioned previously.

But if you are washing down the boat on a regular basis you will go through 10 000 liters pretty quick, I would figure on 1500 to 2000 per washdown

Clorox

Just a good old splash of bleach will do wonders.

I use the following approximated figures as a rough guide per person per day...
Brushing teeth - 1 gals
Washing hands and face - 2 gals
Having a bath - 18 gals x 1
Having a shower - 7 gals x 2
Vacuum system toilet flush - 0.5 gals (depends on toilet / body system obviously )
Drinking water - 0.5 gals (if using the bunkered water and not bottled)
Cooking / washing-up - 2 gals
Washing machine - depends on type but approx 16 gals per load on a modern machine. I allow 6 gals per day per person.
Deck showers - 6 gals

Deck wash / chain wash - contentious one this, depends on skippers routine and size of yacht.

Hi,

1. 2-3 month is a really long interval for such small quantity of water.
If it was not properly treated before (during) bunkering, then probably some veeeeeery small creatures would like to taste your water as well.... (Especilly, if it's hot).

2. UV- light helps a lot. If possible, do some circulation through such lamp.

3. If that water will be used for drinking, then let me suggest a mineralizing filter. Like "DEMI", etc. (Especillly, if water is produced by evaporator).

4. Special treatment by pills. Look at some of ASHLAND (DREW AMEROID) products or similar.

5. Keep a fresh water tank in good condition to prevent different problems.

P.S. I looked at Your project through the i-net. Very interesting. Good luck.

Grotjes,

Andrei

Wet Stuff

Regarding the storage I would never keep water for this long as pointed out in a previous post strange life forms may start to appear. If you had to us water that is old then I would agree with Ken Bracewell and use chlorine - there are published tables on the correct amounts to use. U.V. (although not regarded totally safe) and silver ion treatment are other good methods. I would not recommend the use of ozone although it is very good as a disinfectant it is also very powerful oxidizer and therefore it attacks anything metallic leaving holes in your tank top/vents etc. Filters will only generally remove solids - charcoal can be also be used to improve smell/taste remember if the water is contaminated the filter will do little or nothing do nothing to make the water safe and a dirty filter can add to any contamination.

For consumption from my experience with large yachts between 65M and 75M daily consumption can vary from anything upwards of 2000L (530 US gallons) a day with 25,000L (6,600 US gallons) not being uncommon a full days wash down on can easily use 10,000L then you have laundry, galley, baths and showers etc. On one yacht the pool held 7,000L and it was not unusual to fill that twice a day. Toilets - especially vacuum ones in the bigger scheme of things use very little water.

I would almost guarantee 100 gallons/person/day