I eliminated all the power bricks on my tank several years ago.
The plugs were actually really easy. Most of the equipment already used a 2.1 x 5.5 mm jack. I reused a lot of the original wiring and just ran the wires to the bigger power supply. For the ones that had a different connection or didn't have one in the first place, I put one on. You can buy a 10 pack of 2.1x 5.5mm male and female connectors on
amazon for $10.48. Or a least I could 3 years ago when I did this project. Then I reused the brick from the return pump to power both wavemakers. I reused it because it supplied 3x the wattage of the gyre wavemakers use, and it was free. This gives me some water circulation redundancy in case the main power supply fails.
I have a pair of 24v power supplies. One for my tank needs and the other runs my 440 watt DIY led.
Then for the things that are anything less than 24v DC, like my backup battery changer and dosing pump etc, I used adjustable buck converters.
They do have exposed connections, but they are not a shock hazard because they are low voltage DC. However, they may short out if they contact something metal. So I put them in a cheap light switch type electrical box along with my relay for the automatic battery backup.
Those items, a soldering gun, wire, and some shrink wrap was all it took to complete the project.
