[Janeymiddlewife]

I'm growing some peppers in pots, they were sown in modules and then transplanted into 4 inch pots once they had their proper leaves. Last weekend I noticed the compost had a white crust to it, so i sprayed with cheshunt compound, but it's back this week
The seedlings seem healthy enough, should I spray again, ignore, repot or remove top cm of compost and replace with fresh? - I'm watering from underneath, they're stood on the windowsill in kitchen in old grillpans
thx

[Trillium]

Sounds like recurring fungus from overwatering. Despite watering from below, it sounds like you're overly generous with the wet stuff. At this stage plants need to be only lightly moist, which means frequent checkings rather than a few heavy waterings.
Plus, the area they're in might be a bit too cold, which indicates the fungus recurrence.
Spray again, move plants to a slightly warmer area and limit the watering to necessity. You could try the cooled chamomile tea spray which is an excellent fungicide.

[Janeymiddlewife]

Thanks trillium, they're in the kitchen which is warm, but very humid which probably doesn't help. I'll let them dry out - what strength camomile tea should I use - I've got plenty of it and would prefer using that to Cheshunt compound