Quote Originally Posted by macnasty
Hello and welcome back. I've been dying to ask this question and finally here is my chance! i want to get some opinions about whether or not i should change my reservoir every week to 2 weeks as many people prescribe, topping off with water, or whether i can get away with topping off with nutes, and not worrying about changing the res. i have quite a few tubs running, and changing the reservoirs is heavy duty labour, and i would MUCH prefer to just top off with full strength nutes and change only in between veg and flower. i read that most ppl top off with water, but is there any harm in topping off with nutes? for example, do plants produce wastes that they dispose in the solution, that is toxic to their health? everyone seems to rave about changing the res every week, but very little is said about why this is so adamantly adhered to. this would save me a lot of back breaking work. appreciate it. thanks.

p.s. the reservoirs are usually levelled off at 5 gallons, but can support up to about 10 gallons.
you should definately change your reservoir atleast every two weeks, it is a lot of work that's why i use those garden armor liners for the tray and reservoir
HydroGarden Armor : Hydroponic maintenance made easy.