help plants are yellow and roots brown

marley19001

Active Member
alright lads well having some problems here have just moved in to a house and started up and am doing everything the same as i was before but having bad problems the last two crops the roots are going brown and the leaves are going yellow from the bottom and working the way up the plant,
the temp is 75 in the day and 60 on a night water temp is fine there in nft trays and feeding with canna aqua,
what i have noticed in one tray were it is just started is a film of oil type stuff on the top of the water could this be a sign of some thing anyway try and help me out lads cheers
 
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