The venturi injector is similar to ones used with skimmers or ozone (Venturi Link). The water flows through the main part. The nipple naturally sucks air, but in my case...the food. The dosing pump is a GHL pump. The refrigerator is a 1.7 cu. ft Danby (Refrigerator). It has to be one with a compressor...and no freezer. I drilled a hole on each side. I can get the fridge down cold enough.Pretty cool. How’s it work exactly with the injector? What kind of dosing pump is that, and are you concerned about it handling the low temperature? What temp is it at in the fridge?
That’s cool. I’m sure a lot of us would be interested in more of a walk-through of what you did and considered in this project.
You bring up some good questions Mike...I thought about that . I am using Reef Nutrition food which needs to stay refrigerated or it will spoil. Ambient temperature outside the refrigerator is quite warm because it is near my 5 light power supplies and in a closed cabinet. You will need to see the full setup to see what I mean. The time the food would remain in a warmer climate would definitely affect the freshness of the food because it would be outside for over 24-36 hours with a lot of surface area (silicon tubing) that is warm. Keep in mind, I am only dosing 5 ml, 2x/day...the length of the tubing is more than 5ml which means you are not actually dosing the full length of the tubing at any one feeding.I'm curious, why the decision to run a line with tank water through it, as opposed to keeping the doser on the outside and have the smaller holes just for the dosing lines in the tank. I would think running tank water continuously though the fridge would do 2 things, 1) cool the tank ever so slightly, and 2) make the fridge work harder to keep cool. Plus I might worry about potential condensation issues on the dosing pump's electronics, then again never put a computer inside a refrigerator so don't know what would happen While outside the tank, there might be a bit of food in the small amount of tubing outside the fridge but that shouldn't pose much of any problem assuming you're dosing some what regularly and not once a week or something.
Actually, that is why I use Reef Nutrition food...the stirring isn't really necessary...the critters stay fully suspended. I talked with Reef Nutrition about this up front. For some other brands, the food settles to the bottom and then you would need a stirrer for sure.Now you need a small gentle shaker table in the fridge, to keep the bottles nicely stirred.