The only difference in lighting for the second batch was that i flowered the 1st week with the MH, rather than go straight to HPS. I thought this would decrease the stretching but it didn't happen.

I'm on day 45 of flowering now and have stopped adding nutes. I'm gonna let the plants use the remainging nutes in the tank (which should take a few days) and then just go with water until they're done.

I'll do some pics at day 49.