Beginner Gardening: Heating pad to germinate seeds, 1 by Kindlekat

Kindlekat wrote:
Quick tip: Get the seed heat mats on Amazon.com. They are a bit cheaper there than the retail shops.

As this was my first year starting seeds inside I had plenty of time to research and I went with heat mats and a shop light. My celery seeds still havent sprouted yet, not sure if they ever will, but the tomatos I planted on the 12th came up in only 3 days!! I was astounded. I left the heat mats on 24 hrs and lights for 14. My next question was whether or not to leave the heat mats on until they have 2 true leaves, or turn them off now. I've already taken the cover off. After reading all these it looks like I turn the heat mats off now...

Attaching a pic of my simple shelf setup!