Hey Fishlore community, I have realized that my bathroom (where my canister filter and heater are) is readily equipped with an available water source and a drain, I don't have to plumb anything. Great, I HAVE to make a drip system now The dripping part seems pretty straightforward. It's more the overflow part that worries me, it has to be failsafe or I'm just asking for a flood. On the other hand, it doesn't have to handle large flows seeing as it will likely just have to handle 1 gallon per hour (or even less). It doesn't have to be especially silent I assume, because such a small flow rate can't generate much noise. Here's the basic plan: a container hangs on the back of the tank, a u-shaped pipe makes the tank and the HOB container connected vessels (meaning they'll always be at the same water level), and a pipe goes through the bottom of the HOB container to the drain. Now here's the bill of materials I'm actually planning on using. test tube with flat bottom (lab glassware), ⌀30mm H120mm U-shaped tube (lab glassware), ⌀14mm H140mm glass straw (for cocktails in fancy bars), ⌀12mm H200mm Here's the procedure I'm planning on following: drill the test tube with a diamond coated drill bit (⌀12mm), as close as possible to a side without breaking the tube, cover the outside of one leg of the U-shaped pipe in silicone and slide in place inside the test tube (on the opposite side from the hole) insert the glass straw and silicon in place from the outside If everything goes right, and after curing, I will be able to hang the device outside my tank and the weight will be supported by the U-shaped pipe. The legs of the U-shaped pipe will actually be longer than on my drawing (see photo instead) thus will be less likely to collect air bubbles and disconnect the vessels. For redundancy, I am planning on making (at least) two such devices. Is this going to work?