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Yellow spot on my leaf. :) PH fluctuation ?
Iwanteatgelatostarted grow question 4 years ago
(Water change) I had set to 5.5 PH and waited 20 minutes. I put in my fertilizers, everything was fine. The next morning the ph had dropped to 4.7.. So I put it back up. The next morning yellow spots appeared on the leaves. Did you confirm that is due to ph fluctuation ? Thank's
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Frigaultanswered grow question 4 years ago
Aim for a ph around 6 this way if it drop it will dropbin acceotable range. Ph tends to swing if temps swings but not this much. Also check your ph after your mix your fert. Fertiliser wil drop ph. So if the water is at 5.5 and you add fertilizer it will drop a 0.8 to 1 easily.. i suggest putting ph buffer instead of changing everything. This low ph will eventually kill the plant du to nutrient intake problemes.
MrGreenMananswered grow question 4 years ago
5.5 is far too low to start with. Minimum you should aim for is 5.8 in hydro. Like Frigault says, aim for 6.0.
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