best way to flush

havent seen any info on this but is there anything you can put in the reservoir to kill the nutes to start fresh? i think i put to much nutes in, im using gh in my flood table and im seeing a little yellowing on the tips and beginning of the leaves, i was thinking there has to be a solution? my water was a 100 ppm before any nutes and with its 360ppm and there about 3 weeks from clones and have 3 or 4 new leaves heres some pics

Not enough food buddy, they are hungry. Scroggsy.

how can you tell?

because your feeding them 260ppm, thats not enough they need about double that. The leaves are yellow in this case equals hunger. scroggsy.

i figured i was giving them to much to start off

If you feed too much the tips of your leaves will darken and get crispy. Those in the pics don't look burned at all IMO.

deficiency, not over feeding. common mistake. There are all these people on the forum saying "I don't feed them anything for the first 3 weeks" or other such bullshit. Newbs love to try to slam nutrients into their plants because they have big errections thinking about all that weed they are going to get s there are many people that caution on over feeding.

For me, with my nutrients I generally follow the following PPM's... (subtract your base tap PPM).

clones until 1-2" roots 100-200
rooted clones 400 (but easy on the nitrogen)
4-5 nodes.. 600-800 (800 may be on the highside).
from 5 nodes to 6 weeks 800-1200 (I have never seen a vegging plant that wanted higher than 1200.

FLUSH

Flowering
I bounce around a bit between 1200-1500 but I hardly ever ever go over 1500.

If I do, then I take a little water out of the rez and add fresh water. I don't add back nutrients to the rez until the PPM gets below 800. But in flower, you really have to let the plant guide you in terms of what they want and when. Flowering is intense for a plant and they want a certain element, they typically want ALLOT of it. For this reason, I employ a routine foliar treatment with kelp and LIGHT flower nutrients/cal mag.

Hope this helps.

oh yeah, we can tell because in the one picture your leaf is discoloring along the leaf margin and developing spots.. which is CLASSIC micro nute deficiency. The other photo, the base of the upper leaves is a lighter green/yellow which tells me that it is low on nitrogen. When your plants get older the leaves can be a good indicator of what is happening.

If the leaves are angled up like they are saying more more more (like praying to the lights) then all systems good, maybe a little on the light side of nutes but better than the alternative which is...

Drooping leaves or leaves that curl under or twist such that the plants are trying to hide or get away from the lights with little brown leaf tips or when looking at the plants they look like they are screaming "it burns it burns, it burns" like in the exorcist when the priest throws the holly water on the possessed girl. Then you know that A. too much nutrients B. light too close C. water logged or low o2 amounts in water. Or, if your a compete douchebag grower with abso-fucking-lutely no growing knowledge at all... All three.

Your plants look good. bump it up to 600. Your in an exciting time, those plants are going to fucking explode soon. And its NOT from feeding them moire nutes (well it is but don't get the idea that more nutes = more growth) they are just in that phase. My clones linger along till about 4 nodes then go nuts.

i was basically goin on the directions on the back of the nutes, it said for seedlings and clones to give them one, 1 tblsp every 4 gallons so i did the same for the other 2 nutes , by the way im using gh 3 part nutes

the on the bottle isnt tailored to to the type your growing so the on the bottle is void

first time so im just kinda goin easy, better to little then to much