All-

New to seed starting.

I started 48 cells of tomatoes 2 weeks ago today. Using the APS system and the organic seed starting mix from the same retailer.

The seeds started well, and are under 4 x 48" shop lights. However, they seem to have stopped growing ... they have been ~1-1/2" tall now for 4-5 days and don't seem to be doing much.

Temps are 65F or so, they are getting 18h of light and 6h of dark. The mix is compost based, so I have not fertilized yet (bag says don't need to). I am running a fan to strengthen them.

It looks to me from browsing the web that seedlings are usually bigger and usually getting their second set of leaves by this point. Any thoughts? The only thing I can think of is that the APS system gives continuous moisture, which seems to be against lots of stuff I have read. However, the seedlings otherwise seem strong and hardy and have good color.

Any thoughts? Thanks in advance.