DWC Changing the reservoir under scrog net
- Thread starter kubat
- Start date
Billy the Mountain
Well-Known Member
You should be able to rotate the level indicator tube to remove the vast majority of the water. If you want to remove all the water, which really isn't necessary, you can make an access hole on the lid and insert a tube connected to a pump; plug it when not in use. I always treated dwc as an aquarium and only did partial changes every week or so; never had any nute issues.
amneziaHaze
Well-Known Member
i have a little bit bigger tubs (60 or 70L) what i have done i drilled a little hole the same size as a little aquarium pump the pump does 200L/h the hose reaches my toilet soo you dont have to carry anything. same with the readings of ph and ppm same hole just a little suction thing hand pump
Jonesfamily7715
Well-Known Member
Siphon hose works in a pinch.. then add pump later
futurebanjo
Well-Known Member
Yeah this is pretty much what I do, I just have a big 100L DWC though, and nothing else, so I have a cheap water pump and 10m of hose, and just drain it out into the toilet in the next room.
Takes about 40 mins to drain or refill, as its quite a slow pump, but it's good for this purpose as it doesn't pump so fast to make me rush around too much!!!
To refil I do the same in reverse, but I prepare the new solution in the bath tub, so I can adjust PH, EC etc. And when I'm happy with it, pump it back in from there.
It's a dedicated pump and hose just for this purpose, so I can pack it up after use, but I do run some chem-san (sanitizer for beer brewing kit) through it before and after use, to keep the hose clean.
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medidedicated
Well-Known Member
I pump outside through a window. If I grew in basement if the drain there goes back to the city idk what id do.
Whatever it took though. If Im not mistaken fertilizer going back to the city cant remove it. Bonds are too strong.
Whatever it took though. If Im not mistaken fertilizer going back to the city cant remove it. Bonds are too strong.
Similar process.
I have a "35 gallon" res that holds 28 gallons of nutes. My pump is 330 gph so it empties the res in 5± minutes. I make a new back of nuts in a 32 gallon trash can, pumping the water into it from a 55 gallon cistern filled with RO. Once the nutes are mixed, I pump the res out into the backyard, move the hoses around, and fill the res from the nutes in the trash can. I adjust pH in the res and then turn on the pH controller.
The whole process takes a bit over an hour.
Fortunately, I only do a few res swaps over the course of a grow.