ph controller yield

Hello, according to the inventor of Kratky method, one should adjust the ph once at the beginning and then forget it. But the problem is that PH keep rising, and I believe we should constantly use the ph down to adjust it right ? So IT IS SET AND FORGET OR NOT ? If I need to adjust the PH then...

Some strains are more sensitive to PH. I have noticed that the growth often is increased a few days after I correct the PH. I estimate that I let the PH drift to far a few times during each grow and those days quickly adds up to a noticeable percent of the total grow cycle. Question is if an...