If you don't have a EC of TDS meter you should top off the rez with PH adjusted, distilled or RO water with nutes pre mixed (1/2 strength), most of the loss of water is from evaporation. The evaporation leaves the nutes in the rez and this means higher PPM, and can burn the plants. I find that if you change the rez every week, you don't really need to worry too much about this, maybe make a habit of adding 1 gallon of distilled or RO water with nutes pre mixed (1/2 strength) halfway through the week. For example: I change the nutes on sundays, and on wednesdays I add 1 gallon with nutes 1/2 strength nutes to each 6 galolon rez, and I have no problems with my PPM levels. I start the week at ~475 PPM and by the end of the week I have ~300 PPM. I use DWC style hydro.

You should post some pics for us to see.


L0rdsOth
lordsoth666 Reviewed by lordsoth666 on . Question about REZ level and NUTE concentration i was wondering this, my 5 gallon REZ level lowers naturally due to evaporation, uptake in plants or whatever the reasons. so when the water level lowers like this, does the concentration of NUTES increase? or is there actually less NUTES because the plants have eaten them up? so is the water evaporation/plant uptake in proportion to the NUTES being used up? okay, this question is getting to weird sounding... basically, if the water goes down in level, what do i do? i know i'm getting an Rating: 5