Does pH matter when flushing to correct if mainly flushing built up salts ?

I get you want the soil to be a good pH level . But when flushing to correct nute lockout . I assume you just need to flush out the salt build up and can correct the pH level accordingly .

What medium? If it's not from the earth, it's probably not soil. Either a peat based, compost based or Coco based potting mix.

If peat based, tap water will be fine as it's usually acidic. Has it got any buffering agents like dolomite lime? If you have lock out, and there's salt buildup, 90% of the time it's too acidic, so alkaline water is fine.

I assume it's a peat based mix fed with salts. Have you done a slurry test to verify medium pH?

VincenzioVonHook said:

What medium? If it's not from the earth, it's probably not soil. Either a peat based, compost based or Coco based potting mix.

If peat based, tap water will be fine as it's usually acidic. Has it got any buffering agents like dolomite lime? If you have lock out, and there's salt buildup, 90% of the time it's too acidic, so alkaline water is fine.

I assume it's a peat based mix fed with salts. Have you done a slurry test to verify medium pH?

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I'm using biomix all mix and ghe Terra aqautica .
Tap is 7.1ph seems to be all over from 6.8-7.5 checked and doubled check pH pen but yea water pH is up and down . ATM it's 7.5

I did a slurry test 2 weeks ago and it was 6.8
Biobizz all mix guide is 6-6.2

I wouldn't worry toouch about adjusting the pH for flush, but for good measure you can pH the fees going in afterwards. You can for good measure, but it's not too critical. Considering its an organic mix I wouldn't be feeding with salts. I don't know that nutrient line so I'm not sure what it is. Most organic mixes have a buffer agent to stabilise pH.

If you have been feeding with salts though, and continue it's probably a good idea to pH the feed. Be aware flushing an Organic mix isn't the best idea usually.