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PH keeps falling

slygrow

Member
Hope someone knows why.....I'm suddenly having PH down swings with my first hyrdo grow. 18 days into first noticable flower everything has been perfect till last 3 days. Now PH falls rapidly every 4 hours or so. Roots all look fine visually ...don't see anything rotting or like that, all nice and white (lots of them tangled together in a big wad)
Moondust nutes 700ppm
add epson salts to total 840ppm
distilled water
2 airstones
fogger
air temp around 78 to 82 degrees (light cycle) and drops to 63 to 65 during dark cycle
Changed the rez every 5 days, including last night, add new nutes, adj PH to 5.5 ~ 6.0 (liquid tester) as always before, worked perfectly. Now within hours the PH drops to 4 (orange level of PH sheet) I'm using PH up liquid to bring back up to 5.5~6 but drops back again quickly. ??? wtf....anyone got an idea here? dont want my girls to tank now... help please
 
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