|12-23-2014 10:21 PM|
I eventually upgraded my dosing pump
bought two pump heads/motors...a 12v relay...and wired the thing so that it doses macros one day...micros the next (basically, two mechanical times plugged into eachother on a 12 hr setting) and a digital timer set at 1 minute that turns on everyday
a simpler design would be to have a timer that energizes the relay on for thirty minutes while the other multi-timer (at 1 minute) controls the first pump for macros...and then comes back on 6 hrs later and controls the micro pump
...but if it aint broke
also, Im mixing my macros
KNO3, K2HPO4, K2SO4 and MGSO4
and my micros
Millers Micro (or CSM depending on what I have on hand), FE and CACL2
...all thats left is feeding the fish and water changes
...I cant wait to own a house so I can do this with some scale
|02-19-2013 12:00 PM|
3 months in...no problems with the pump/tubing
changed the solution once....next time im using a gallon jug (~3780 ml) so almost 6 months w/ no effort
to be fair tho...I have a soil tank...so I dont dose micro nutrients...only macro
my biggest problem so far was that when i mixed the MgSO4 and CaCl2 into my dosing solution...CaSO4 would precipitate out
now I dissolve the CaCl2 in tank at water change (and my plants have straightened out for it)
|01-19-2013 09:06 PM|
You might get aquarium water into your fertilizer bottle!
|01-19-2013 07:30 PM|
|Optix||no clue...when you go to radioshack...just eyeball it|
|01-19-2013 06:34 PM|
What size box would you recommend both pumps fit in?
|01-19-2013 06:27 PM|
2. yes...they have several sized project boxes...so 2 in 1 housing is easy
3. yes...both positive leads to the positive supply...both negative leads to the negative (though technically if you switched it up duing assembly...the pump heads would rotate different directions...wouldnt hurt a thing)
4. yep...standard cheap airline tubing -little trick...cut a V in the bottom so that the tubing cant get stuck to the side of the fertilizer container and mess up your dosing
|01-19-2013 03:55 PM|
just to make sure I'm getting the right power supply,
Planning on running 2 pumps on one supply.
Another few questions
Will 2 pumps fit in radioshack project box? Or will 2 separate boxes be needed?
to run parallel you would run the positive from power supply to each of the 2 pumps and then the negative from the supply to each of the 2 as well?
Where did you get the tubing? Is it just airline tubing or co2 tubing?
Great thread BTW, very informative and saves $$$$$.
|01-19-2013 02:24 PM|
1. deer geezus is there nothing they wont counterfeit? lol
2. $30 + $15 shipping + $10 timer ...mine was cheaper
|01-10-2013 05:56 PM|
|Wicket_lfe||Saw one on ebay just like you made from HK selling for $30.|
|12-20-2012 09:43 PM|
|12-20-2012 09:36 PM|
lol...nice. comes to thread to advertise his forum
|12-20-2012 05:46 PM|
For example, the one on eBay has a minimum flow rate of 0.1 mL/min (which I guess is as close to 0 as possible).
In any case, autodosing was part of my plan for an Arduino based aquarium controller
|12-20-2012 05:43 PM|
Here's another one available on Ebay:
|12-20-2012 05:19 PM|
Next project to control with the arduino.
|12-20-2012 05:06 PM|
The technical details lists the maximum rate (100 mL/minute), but I wonder what the minimum is...
|This thread has more than 15 replies. Click here to review the whole thread.|