Aquarium drip cup
Description
When you have a salt water aquarium, there are times when you need to add chemicals or medication to it. There are (quite expensive) dosing systems that allow you to do it slowly – and slowly is generally a very good idea, because it's easy to shock fish and corals and so forth. But, you know, _expensive_. Here's a way to cut that cost to just a fraction of that of an automated dosing system. The idea behind this is after you print the cup, you take it and file just the _very tip_ of that cone off so that you have just a tiny, tiny hole, and then you place it over a port in the lid of your aquarium, fill it with a mix of salt water from the aquarium and your chemical / medication, and let it drip in there slowly. You can set the drip rate for the cup by how much of the tip of that cone you file off. Be _very_ conservative, it really doesn't take much at all to get a good drip going. It'll drip faster at first, then the rate will drop as the amount of fluid in the cup drops. You can increase the rate again by simply adding more water from the aquarium to the cup; this also results in a slightly more dilute drip, which generally works in favor of the living things in the aquarium. The cone makes sure that the fluid drips _into_ the aquarium, and not all over it. The cup has a slightly sloped floor that slopes down from the cup edges towards the wide end of the cone. This ensures that almost all of the content ends up going down the throat of the cone. Rinse the cup very thoroughly before and after each use. This was made with [Tinkercad](https://www.tinkercad.com/things/5Z8JunugMcE). It was my first project! My friend Blake printed it for me; it convinced me I wanted to get a 3D printer of my own, and now here I am. :)
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