topping off hydro unit

[TVWoLfMaN]

When you grow hydroponically(DWC), you have to keep your reservoir topped off correct? Do you just keep it topped off for the two weeks with fresh water? Or do you have to add nutes to all the water added during the two weeks before water change.

TVWoLfMaN Reviewed by TVWoLfMaN on 04-15-2010. topping off hydro unit When you grow hydroponically(DWC), you have to keep your reservoir topped off correct? Do you just keep it topped off for the two weeks with fresh water? Or do you have to add nutes to all the water added during the two weeks before water change. Rating: 5

[khyberkitsune]

Just top it off with half-strength nute solution.

Now, question - why two weeks? I've done it before but usually a weekly change is the best idea.

[tinytoon]

topping off seems to be a personal choice thing. I read some change every week (as I do), some every 2 weeks and if I remember correctly Weezard never changes his. He grows in coco and as plants need water he just adds. Now as for what to add that again is a choice thing. I believe the majority of peeps top off with plain ph'd water until they have added back the amount they started with and then drain and fill. Example: 5 gal bucket has 3 gals water, after topping off a total of 3 gals you would drain and fill. Others do a 1/2 str mix. What I do is alternate and it works for me. 1st topoff is plain water. 2nd is full str nuted water and just keep alternating back and forth till week is over then drain and fill.
So bottom line ........ personal preference and what works best for you. :jointsmile:

[danlboy]

I follow Latewoods legacy 3 part GH use R/0 water and top off with 5ml CalMag plus per gallon. I change resevoir weekly simple and works great for me