Howzit, Rube?

Sweet!:smokin:

Not sure what you plan to do with the safety sprig either.
Perhaps a small cork? Balloon? Open vertical column?
I'd go with the open column and drop a meat thermometer into it.

The switches are easy.
Assuming they are N.O., (normally open)
Wire them in-series with the fan.
Just cut one wire to the fan, and tie those cut ends to the switch.
Glue the switch on just after the last led in line.
When the water reaches 55 Celsius, the fan will start.

From the looks of it, that will take a while.
Got a lot of copper to heat.
What does that pup weigh dry?

Bubbling with ideas, but trying to wait to see how you deal with the details.

Aloha, and Good job!

Weezard
Weezard Reviewed by Weezard on . LED-WATER-HEATSINK Hello! I am a noob DIY-LED-GUY, in need of assistance. Now, I'm about to fire up an LED-DIY grow and since this is my first time ever making an LED-LAMP I've decided to jump straight into the deep end of the pool and do a water-cooled rig. As pipes are mostly round there was an issue with lack of flat space to mount the LEDs on and the right parts was hard to find, so it kind of just ended up like it is. My question is: will it work? I have an aquarium pump that goes between the Rating: 5