3 weeks in and cleaning the screen about every 3-4 days as I keep getting red stuff. There is a little bit of green hair, but I mean a little. Should I keep on with this for a few more weeks or upgrade lighting (little reluctant given cost of nearly 20 GBP each).

Am using 2 x 45W cfl with reflector on an oversized screen of 12" and 12" and flow of 60lph per 1cm