I'm guessing I'll have to get one online, unfortunately. Aint shit around here, I'd have to drive an hour to find a hydro store. I might try walmart just for the hell of it. So by flush, you are referring to the period ≈two weeks before harvest? Do you really think it would take all of 10 gallons, and is using distilled water in the stage necessary (rephrase: how would not using it affect the plants?) Thanks for the input!
The final Flush yes is the last to weeks, you might need an interem flush as well if salts build up in your soil to much. I will try to explain it all as best I can,
Feeding: for feeding waterings give your plants 1/2 their pot size in food/water, so if you have 3 gallon pots then each plant gets 1.5 gallons of food slowly added, should take about a full minute to add your water.
Watering: While myself I overdrive my plants and after about 3 weeks old they never get pure water again (unless its a flush) when starting out you should alternate feeding and watering, on your watering you should water VERY slowly, some times taking short breaks during so you can see if water is passing through, the moment water comes out the bottom STOP, when watering you want very little run off, to much run off with pure water can lower your nute levels meaning you will have to feed in stronger doses which is a waste.
Flushing: this should be done every month at the max and at minimum every 3 months, Each plant will get 2 gallons of water per gallon of pot size, so 3 gallon pots 6 gallons of water, again go slow, make sure to fully saturate the soil and pull all salts out.
Final Flush: the final flush is different, you will go 1-1 on this so again 3 gallon pot to 3 gallons of water, for best results go SUPER slow, and flush in 1 gallon of water every 5 mins, do this 2 to 3 times in a row for best results, what you are doing is completely removing left over ANYTHING in the soil so the plant will finish up the grow on only the nutes it has stored up, when your plant is ready to harvest it will look a mess all the leaves will be wilted and yellow and most should fall off on there own if not just by touching them, that is the sweet spot, if you dont do this you bud will have a chem taste from your nutes, high nitro will leave a coin like taste in your mouth, mag left behind will spark and pop when you smoke it.
(warning: for EXPERIENCED growers only, if you dont know what your doing you will wreck your crop)
Now you can forgo a final flush in favor of a water cure, in my experience they accomplish the same thing although people that do it swear they get more bud and it taste way better.
to water cure, but your bud down para normal, but insted of hanging it up, cut it into its smallest buds and submerge in ICE cold RO water, leave in a dark place, every 12 hours completely change out the water, do this for 5-6 days, then pull out the bud and dry para normal, the RO water will seek to equalize with the water in the bud thus removing the trace elements, repeating this step will reduce them to levels some times lower than flushed bud and if you are careful it wont affect its potency. be warned, if you dry room does not have adequate ventilation then you bud will mold and then its garbage, and if you do this to long the plant matter will begin to rot in the water so if you dont know what your doing DO NOT DO IT.