Of course filtering your water is better than not. But here is the thing, If you get a RO system, They take forever to fill a five gal bucket. You should rig up a float valve to a extra res so its always full when you need it. Otherwise if you fill up a lil as needed your proably ok. To be honest I dont let my buckets sit out overnight, I just add back a lil at a time. I use a RDWC system. So all my buckets are controled by one bucket and Im able to fully drain the entire system without moving a single plant. I like it better this way. After vegging a plant for two months only to have it snap at the base while tring to change over to flower nutes is a real kick in the balls.
CG-First off CONGRATS on the root growth! Its like x-mas! Rain water is the BEST water you can use. It should have a ppm around 5-10. If you can gather enough this is deff the way to go. My tap water is almost 300ppm! I got a cheep filter to put on my house and it brought it down to 200, still shitty. Still cant figure whats the deal with the pics, ill give it another try....
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I wrote the admin earlier but still no reply....fuckin whatever...