Came across this thread:
Last week I was re-doing my mounting locations from the standard Hydra rail to a custom one. Unplugged the first Hydra, started to unscrew it...... and it slipped, fell and landed at the bottom of my tank where it proceeded to take me a good 5-minutes to get it out. I have a deep tank so reaching to the very bottom isn't always easy.
Step 1 - Filled up the kitchen sink with cool water and placed the entire unit in there
Step 2 - Took apart the unit, washing each component individually in tap water throughout
Step 3 - Disconnected the motherboard from the base unit (washed all the connection pins out)
Step 4 - Disconnected the wireless module (I think? Didn't look like a processor but who knows)
Step 5 - Lightly hand dried everything. Used keyboard compressed air to get as much water out as I could
I left all the components on a clean, dry towel for 24 hours. I checked to see if there were any areas still wet (I used to the compressed air), and there were no water droplets. Then I re-assembled and plugged the unit back in.
SHE WORKS!
I was lucky that there was no power to the unit when it fell in, but the unit works 100%. Its been on now and its functioning as normal.