Hi guys, I just got this school project and I have to invent something to solve a problem. It has to be $20 to make max. ANY problems you have or items that could work better would be appreciated. I just need ideas.
What about Charlie's diy test tube rack? That's solving a problem and inexpensive to build, although not an original invention since test tube racks already exist... depends if the project is focussing on original ingenuity or practical diy skills?
How about a background that you can change the look of by the click of a button? (I guess something like a digital photo-frame the size of the aquarium, probably a small one lol)
Or a tank decor, branches, stumps, caves.... that has interchangeable, connectable pieces, to change the look of it?
You could create fake plants, PVC tubes which are used as caves. You can have a look on youtube and create a cheap polystyrene fish tank. A home made filter, erm... Can't think of anything else at this point.
seeding media to quickly cycle a tank. Why don't aquarium stores sell this?
You can buy those little bottles of live bacteria at pet stores that most people on this forum say don't work BUT everyone will suggest to get mature media from a cycled tank to quick start your own tank. Why doesn't someone have a large cycled tank with a bunch of sponges or something and sell those sponges? Couldn't you just mail them in some of the tank water with may-be a few drops of ammonia added to keep the bacteria fed before they reach their new tank?
If you have a cycled tank, this should be a fairly easy and cheap thing to create/test.
A small device that will plug into a car cigarette lighter and provide a small amount of safe heat for keeping fish at the right temperature on long journeys. May be there is already something people use for taking fish to shows.