thanks for all the input, I'm going down the coca perlite mix. I used a nft system for a while but changed to pots to get a bit more control. moving plants not doing as well as others ect. I am thinking on a auto pot system but, because I'm upstairs, the thought of a leak frightens me a bit. I've been growing for a while now, think I've learned more with my feck ups than anything else lol. I shall let you know how I get on.