Aeroflo2 nutrients/ feeding/ What happened here??

We cropped the first attempt at this new system. There were some issues that we are trying to figure out and make the 2nd go at this a lot better.

There were some plant casualties in this - it could have come from a number of things. Possibly some take over from a strain that got bigger than the rest. What ever be the case - I was told that when one looks like it is dying you should pull it cause it may harm the rest of the plants. Is this true?

Also the buds turned out like fluff. Not dense. We used the GH nutes.

I am thinking it was due to the lights only having 4 - 600watt lights over 120 plants. We had the extention to this system. However the other person thinks he over fed.

It was true we didnt wash the res like we should he did this every 3 weeks. He let the PH get to levels of up 7. No air stone either.

Has anyone used Canna on this system? Should we stick to GH? The system was made by GH - I wanns try Canna but dont want to clog the hoses.

I run my ph in the same system at 5.6, I had a problem first with water temp. Before I got my chiller and put a fan on the pump of the AERO i had water temps between 78-82. After it stays at 68

Thanks I have been reading a lot of other peoples posts. I will keep a closer eye on that as well. It could have been possible. I didnt think so as its cold as hell where I live.

I will also change the H20 every 1.5-2 weeks. Didnt do this as often s people say they are doing this.