Is it necessary to change reservoire in hydro grow?

I am running a ebb and flow system. I have lately realized as my plants drink the water level decreases but ppm increase. My question is if I add water to level the ppm out do I actually need to change the reservoire?

Many will say yes and some will say no. Ive seen guys do entire cycles without changing their res and had good results, but I believe the roots produce some waste that needs to be removed. Adding water to level the ppms is a great way to control the res, but I would recommend changing it at least every 2 weeks. What you described is called "Topping Off" the res. Thats what you should be doing no matter what along with an occasional res change. GL.

somedude247 said:

Many will say yes and some will say no. Ive seen guys do entire cycles without changing their res and had good results, but I believe the roots produce some waste that needs to be removed. Adding water to level the ppms is a great way to control the res, but I would recommend changing it at least every 2 weeks. What you described is called "Topping Off" the res. Thats what you should be doing no matter what along with an occasional res change. GL.

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This is great advice.

+rep coming your way.




J

Hi

I change the water every 10-14 days to keep the ph and nut stable.

When i did not do this i found my system would affect the yield.

I started with changing mine every week. Then every other week. Now I'm down to changing it once a grow, and I'm toying with not changing it at all.

I never change mine. I even toyed with the idea of trying a "two grow", but chickened out. If your water level decreases, and your ppms go up, back off on the ppms. Your plant is not uptaking all the nutrients you are giving it. You can have elevated nutrient levels without the plant showing burns or "flaging". This can lead to unwanted salts in your system. The number one cause of nutrient burn in plants imo is to much N. This manifests itself rather quickly and is easy to identify, however there are a number of micro nutrients which will build up, without presenting immediate problems.