On Mon, 12 Mar 2012 21:26:21 +0000, Jake
wrote:

Prevention being better than cure, ways to hopefully prevent the
problem are (1) always use clean seed trays and fresh seed compost
rather than multipurpose, (2) make sure there's good ventilation -
stagnant moist air is a real problem for seedlings - remove them from
the propagator once they've germinated, (3) water only with tap water
that's been allowed to stand for a couple of days to let the chlorine
evaporate, don't use rainwater and (4) don't over-water.


Why 'don't use rainwater' Jake? I've always used collected rainwater
for seedlings - have I been doing something terribly wrong?