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Using my cheap meter I end up at around 600ppm. However the meter adjusts for temperature and the temp readings are always way off so I have to use math to adjust for the bogus variable. That is before I add ph down. the ph down raises it to close to 800. FWIW I did employ the RO filter and have...

I use general hydroponics ph down and measure using litmus strips

They look good to me! I don't know the supplier you mentioned, nor am i familiar with the strain you are growing. However different strains can have some seriously different characteristics. Even different phenotypes amongst a single strain can show drastically different physical qualities.

I made a post a few months back asking for help with a plant issue i have been plagued with for years. I received many helpful suggestions from users and adapted my grow to those suggestions. However my issue doesn't seem to be resolved. Basic info: coco, autowatered 4x daily, drain to waste...

I had a cheap TDS meter from ebay, but it gave up. I use strips to check ph

I am curious if the CMH raised the temp to acceptable levels or just produces IR in sufficient quantity

Based on all of the responses I am going to reduce nutrients by half again to feed 1/4 strength (of bottle recommendation). I will stabilize input ph to 6.0 and see what happens. Thanks again for the responses. I don't know how to tell what my plants need by looking at them. I don't have much of...

Thank you all for your responses. I am more inclined to agree with the too much nutes guess than the ph guess. I have been quite adamant about testing and adjusting the ph that it really can't be far enough out of wack to cause these issues. My cheap ebay TDS meter crapped out. So I am totally...

I use water from the well. it has an even 7.0 ph. i tested it a while back with a cheap meter and it had around 175 TDS

I have been struggling to figure out what is causing this ever since I started growing. It has occurred every grow. 5 so far. I make it through veg with nice happy healthy plants, switch to flower and within 2-3 weeks these spots start developing. Typically on lower fan leaves first until...