Well you should get a ph pen instead of the drops. It's way more accurate.
And an ec/ppm meter too.

Don't know how your budget is, but those would be the first two on the list when growing in hydro.
tikiroom Reviewed by tikiroom on . Brown spots, yellowing These girls have been in a mix of sphagnum moss and perlite and being fed Fox Farm's Grow Big for hydroponics. They have now been in a aeroponic system for a day. Perhaps now they are in the system they will recover but I'm curious to see what you guys think. They are about a month old now. This is my first grow so its been bumpy and they haven't had the best conditions concerning lighting and nutes. Rating: 5