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Thanks! This thread made me feel much more confident about what I want to do. I guess my only concern would be using aluminum vs. the thicker copper blocks he used

Would the LEDs produce enough heat to make a difference in the aquarium water? Those cooling blocks are fairly inexpensive. The whole setup may be close in cost to what standard heatsinks run

I was thinking about attaching a cob holder (screws) to a flat piece of aluminum (thermal paste between LED and flat aluminum), and then securing that flat piece to the water block with thermal adhesive.

Hello! This is my first post on this forum. Thank you to everyone who has put in such great effort to help noobs like myself design and build our own lights! I currently have a small aquaponic setup for random plants/veggies that I would like to expand on. I run 3 1000w heaters for my 175gal...