They're looking a lot better now, that flush and feed seems to have done the trick, yellowing has stopped Been a lot of growth in the last 2 days.

Hey giro, i've not forgot about the filter question, the leaflet that came with it is in the box that the lights and fan came in and I put that in the loft last week. I'll go dig it out soon, give me a shout if you're in a hurry to get one.

Here's some pics