Quote Originally Posted by sirruler
...after your good advice Rusty about flushing and PH and feeding they are really starting to look better, bob marley would be proud :rastasmoke:
thanks
Is he another grower? <kidding> Thanks, and best of wishes for further success. :thumbsup:

Milwaukee ph pens are programmed to recognize 7.01 calibration solution, but if you do not also purchase the storage solution, I'd think about getting the Milwaukee 4.01 calibration solution. They recommend this on the instruction sheet, but don't mention it at all in the product info prior to purchase. You can't let the electrode dry, or it will kill it's accuracy.

Discount Hydro (dot com) has what you need. Search Milwaukee ph pen once there, it'll take you to the proper page. :jointsmile: