hi all.i joined 2day and this is my 1st post.ive recently decided to try and grow our own veg.As i have a young family thought wed all try and be a bit more green.we put up a polytunnel in which we are growing toms,chillies,carrots and lettuce.ive noticed ants around in the soil,and wanted to ask if they will be a problem or can i leave them.any advice would be grt.thanks nathan