PLEASE let me know in a comment if you need clamps for different glass thickness

Water temperature is critical to maintain a healthy reef tank.

I find most fan ramps from popular brands to be both expensive and noisy, which is why I designed my own.

I've used some of the best computer fan available, and they are super quiet, I can stand next to my tank and I won't know if they are powered until I look at them.

I have used 3 80mm Noctua NF-A8 ULN, but you can use two, four, just print less or more "connector" pieces to assemble them and you are fine.

I've made two 5-fan ramps and two 7-fans ramps (with one extra middle foot) for large fish tanks.

For 3 fans, you will need 2 bottomConnectors, 2 topConnectors, 2 topCoverJoins, and one of each of the other parts.

WARNING: files foot_left and foot_right look similar but one is the symmetric of the other.
Similarly, you'll need two "clamps", one being the symmetric of the other.
If you just print two identical their positions won't align.

I've used glassfiber reinforced nylon screws and nuts, because even inox will rust with salt water (unless you can get Duplex Inox).

You'll need M3 and M4 bolts to assemble the whole stuff.

One power socket, one small switch, a 12 power adapter plugged on a regulator with a temperature sensor, and that's it.

I've built it to replace one that was extremely noisy so I just used its power adapter, so if you already have one fan ramp, check the voltage, chances are that it will just fit as a replacement.

Here is a link to the kind of switch I used:
https://www.ebay.com/itm/283838684692
If the link no longer works, look for "Mini Black 2 Pin SPST ON-OFF Rocker"

And here is a link to the kind of power socket I used:
https://www.ebay.com/itm/201956156411
If the link no longer works, look for "DC Power Supply Jack Socket Female Panel Mount Connector 3-Pin 5.5 x 2.1mm"