Cheap DIY liquid doser - Page 3 - The Planted Tank Forum
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post #31 of 35 (permalink) Old 03-25-2010, 08:47 PM
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I really dont know WHAT YOU JUST SAID...

But it worked with a very small hole in the T. I noticed that this hole was the most important, as it really effected how fast it doses and how fast or slow it fills. Still working on the tubing refill cause it filler 15ml twice in an hour, then it filled 7.5ml once, then 12ish the third time. As long as it at least doses 11 average over a week of tri-weekly dosing, hmm I dont care as long as it doses something. Welcome to my world!

IF ITS GONNA GROW, ITS GONNA GROW! IDK anymore


But Id guss this really doesnt matter since im changing water weekly!

75 gallon "Piranha Kingdom"- wet/dry, FX5, CO2, pH controller, T5HO 4x54, ferts, SunSun Pimp Club Lucky #11, Fluval Pimp Club #17
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post #32 of 35 (permalink) Old 03-26-2010, 12:45 AM
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I'm saying that it works fine while testing by blowing through the tube, but when you hook it up to an airpump for a minute then additional unwanted liquid enters the coil from the fill hole making it difficult to get an accurate dose.
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post #33 of 35 (permalink) Old 03-26-2010, 05:44 AM
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hmm, still cheacking doses... still averaging 10 ml on a supposed 15ml dose. Its going down!

75 gallon "Piranha Kingdom"- wet/dry, FX5, CO2, pH controller, T5HO 4x54, ferts, SunSun Pimp Club Lucky #11, Fluval Pimp Club #17
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post #34 of 35 (permalink) Old 01-06-2011, 06:56 PM
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Hello, I am looking for a good 2 part dosing system that's cheap and I don't mind if it's a relatively simple DIY project. I found this using Google. Does anyone know if they have gotten this fairly well ironed out or is there still significant issues with this design?

I'm having to dose a fairly significant amount of calcium. Approximately 2 - 3 cups per day of calcium chloride to keep it at 400. Alk remains stable with around 2 to 3 tablespoons of baking soda per day. If I ever go out of town I'll need to auto dose alk also in a dissolved solution. That's in addition to 1.5 gallons per day of top off kalkwater!

In a 125g tank with 30 gallon sump.

I read most of the posts and some say it works, some say it doesn't. I'm not looking for overly accurate, just something that would keep up with my alk and ca depletion on a weekly basis.
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post #35 of 35 (permalink) Old 01-06-2011, 07:34 PM
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My guess is that only the OP has gotten it to work reliably.

I'd suggest you look into peristaltic pumps. The "water pump dosing" might work as well, a bit cheaper, with the added benefit of agitation of the solution.

Check out my signature link for various autodosing methods.
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