From the time i fill it, to the time i change it. It doesn't hardly use any water. Now that the temp has risen some around here i'm having to add some to keep the EC down. It def. doesn't get anywhere near as low as your's.
I have a rainsoft water filter system for the whole house, so i use my tap water. But when i have to add more water i use my R.O water.
Water seem's to be clear, short of the color given to it by the
nutrients. At the bottom of the tank you can tell the nutrients i think are settling but only after a solid week or more of being in the tank.
And no i haven't put any H202 in my system, should i and about how much?? For oxygen i have added 2x10" air stones.
And to make sure my plant's have been getting the right nutes they need that's anothe reason i dump and redo my entire system. Remember i was using GH FloraSeries, but do plan on swapping out to the Maxigro/Floramato nutes. I think it will be easier and more cost effective.