Thanks everyone. :thumbsup:

Chrissy, I do have an extractor fan/filter. I think you can see the passive intakes and part of the carbon filter in one of the photos but here's a better shot. I'm a n00b but I'm not a total 'tard. I can't be having dodgy odours going round. I think the cabinet the husband and I built is pretty decent, I just get in a muddle about the plant milestones, it seems.

[attachment=o200486]


Also the sprouts are looking a bit better (straighter) after having some light. They are on a normal day-night cycle now, with that filtered light via paper on a tupperware thing. Here is a photo without the "light filter" over them so you can see.

[attachment=o200487]