I have built a germination table in my greenhouse using 1/4" tubing and
a hot water heater. The table holds 30 flats and does a great job. I
just put a thermostat under a flat and hook it up to a circulating pump
from the hot water heater (1.5 gallon undersink model). It works great,
but it's in a greenhouse, where there's plenty of light available. I
recommend bottom heat if you can do it.



lotte potter wrote:
...Has anyone had any success with heated germination trays?...