DIY Spraybar and air pumps- a few questions.
Thanks for looking at this thread. One day, maybe I will be able to answer a question or two and not ask so many.
First: I want to make a spraybar for my 29 gallon tank. I'm using an AC50 HOB and an AC20 powerhead on an uplift tube for the UG filter turned down to the lowest setting. I want to attach a spray bar to the powerhead to diffuse the spray and eliminate some dead spots on the far end since both filters are on the same end. Can I use thinwall tubing that I have laying around or should I use PVC? Is there a way to know how many holes to drill and how big, or do I just drill one every inch or so?
Second: What is the purpose of air pumps for an aquarium? I used to think they oxygenated the water, but found out they don't so besides decoration, protein skimmers, and slight water movement, is there any other purpose? Could I just stick an airstone in the far end, near the plants, to move the water?
The tank is 29 gal lightly planted (2 swords, 1 Apo) 5 platys, 5 tetras, 2 otos, and a 3 (so far) pond snails.
> For the spray bar, I'd likely drill a small hole every 1/2", but you could try an inch, test and drill more as/if desired.
> Air pumps / air stones do in fact indirectly add Oxygen to the water - as the bubbles break the surface, there is an exchange of CO2 (into the atmosphere) and O2 (into the water).
As Abby's dad said...air pumps/stones,curtain's, help move water lower in oxygen from the bottom of the tank to the surface for CO2/oxygen exchange.
They can also help disperse heat more evenly throughout the tank .
Air pump's in undergravel application, either help pull water down through the substrate or.. push water up through the substrate (see reverse flow UG filtration).
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