Water tank ph

[As if!]

Ive just started a 20 gallon tank with gh nutes. Im using gh ph up/down to get the ph down for coco. Im using dehumidifier water with a bit of tap(hard ppm of ~400). Ph usually starts around 7, i get it down to 6, then for the next watering its climbed to 6.8 again.

im using gh ph up/down

what is the fix for this?

 

[BobThe420Builder]

Any enzyme cleaner like hydroguard or z7

Tap can have a lot off buffers that can be a pain in rezzes

RO water works much better

 

[Gond00s]

i would go straight ro water.

 

[As if!]

i would go straight ro water.

i should be able to use just dehu water. Would that suffice?

 

[Gond00s]

i should be able to use just dehu water. Would that suffice?

it depends if its a cheap unit i wouldnt. something like a quest i would.

 

[As if!]

Any enzyme cleaner like hydroguard or z7

Tap can have a lot off buffers that can be a pain in rezzes

RO water works much better

Will this work ?

Hydroguard 1qt https://www.amazon.com/dp/B01B8LYCXK/ref=cm_sw_r_cp_api_i_13ozFb7H6JTNB