Plants are looking very healthy. The self feeding planters are delivering very little excess water to the pots…hope they are getting sufficient water delivered by the wicks in the feeders. Raised lamp to 15”, Daily Light integral at 35.5. Maintaining 6.0 ph and 800ppm nutrient solution. I anticipate that I will need to flush salts out of the medium next week, so I’m reducing my nutrients a little bit.

One of the downsides of these self-feeding planters is the salt buildup at the root zone from my synthetic nutrients. It has always resulted in damaged leaves during flower as that salt builds up. I discovered that by flushing the fiber pots at least once to reduce the EC at the root zone, I can finish my grow successfully without damaged leaves. So I incorporate a flush into every grow now.

Today I decided to do a mid-grow flush to remove the salt buildup in the root zone. Flushed with 16 gallons of water treated with Florakleen to dissolve the salts. Flushing solution was probably around 200-300ppm. The first runoff water out of the root zone had a ppm on 1800ppm, so there’s definitely a salt buildup as expected but not as bad as I expected either. I ended the flush by running nutrient solution through the roots with a ppm of 750. Runoff ppm from the three reservoirs before the flush was 1500, 1795 and 1800. After the flush the runoff for the three reservoirs was 845, 1200 and 1100. I’m hoping this will be the only flush I need since this is a short veg and fast flowering strain.

Refilled reservoirs with nutrient water at 6.0ph and 800ppm.

Sunday: decided that my 3500 spectrum Timber grow light is obsolete and ordered a new spider farmer se4500 for the 2x4 tent. More red light, more efficient light, more light = better buds.

Tuesday: flushed out reservoirs and replaced nutrients with 900ppm and 6.1ph solution. Installed new light at 12” above the canopy. Dimmed to 90% to achieve a DLI of 30.