ph problem with bucket hydro grow

[iboxweed]

My ph jumps from a 5.2 to 7.8 in 8 hours is that normal in a dwc grow. Is it my bubbler ,non clean pvc bucket. water temp is 77 deg. ppm @825.

 

[rillos]

Why is your starting PH so low. Your water temp is way to high. PH 5.8-6.3 Keep water temp 68-72. I would clean my bucket because you may have something going on. Use frozen water bottle's to keep your res temp down and make sure no light is getting into your res.

 

[ImfamiZ]

Water is way to warm also I had issues in 5 gallon dwc so I got a bigger res constant ph balance since, good luck!