QUOTE (ganjademon @ Jun 21 2009, 08:54 AM)

thanks for the relies guys.
bit the bullet and brought the right vega ones in the end, to paranoid about harming my babies!
i thought that hydro would mean its fine, but as stated here hydro is not for recirculating systems.
now im not very experienced at this growing lark but i cant think of a hydro run to waste system? what would be a example of one?
cheers
chris
Rockwool and Coco are almost always run as drain to waste systems, Rockwool has pH issues that mean recirculating would be a real handfull.
Take care with pH issues too when you bubble, aeration can cause it to rise all on it's own, so keep a close eye on it, especially at the beginning and bearing in mind you are "changing stuff" - using a new type of feed for example.