Question on topping off res tank for ebbflow system.

I flooded my 3' x 3' ebb flow system yesterday for the first time. I have clones and they are all young. I was wondering how often or much do I top off the tank with plain PHed water? Everyday? Looking at the PH meter last night the PH has stayed the same and so have PPMs so far.
I am using Rockwool cubes. Thanks for your help!!

Hello?? Thanks

StoneDef {RER} said:

Hello?? Thanks

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Somebody surely can tell me how often to top off the tank. I have heard before, but I do not remember at all.

I top mine off when needed! I add A gal to 3 gal everyother day... Your room temp's will also make A diffrence.