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is it worth while putting this into my tent? it already has white reflective walls. http://www.4hydroponics.com/lighting/items.asp?ItemNo=diamondFusionFilm cheers,

this one? http://www.ecrater.co.uk/p/6725259/hanna-hi-98127-ph-temp-waterproof?gps=1

thanks blacktuna, i did have a look at the red one, think they about £50ish here.

meaning? does £40 = a good or bad meter then? whats the measurements between a good meter and say, an expensive meter? and what kinda brand names would fit into the 'works pretty accurately enough to grow weed' category?

anyone? bump..

I changed all of the water, put new nutes in, and brought Ph down with a few drops, so the test water shows yellow now. Fed old water to house plants i changed the fibre matting aswell, do i need to do that? thanks.

Thanks for the replies. Im using Ionic nutes. should i change 100% of the water and new nutes or just top up? I still seem to have plenty of water in the tray still. What do you mean by 'res or rez'? thanks again.

Hi, should i think about changing the water and nutes soon? can i use the old water for other house plants..? thanks.

Hi guys, looking for a ph tester for around £40-ish anyone tried this? Voltcraft Ph-100atc Digital Ph Meter Pen Tester Stick thanks.