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Old 03-22-2008, 09:09 AM   #1 (permalink)
 
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Default Autodosing PPS Pro

I made a pair of DIY autodosers for my fertilizers.





With these DIY dosers I'm at the mercy of how many ml of dosage is done based on the timer, which the smallest increment I found was 1 min. I found with my setup that I dose 100ml in a cycle.

So, I created a little spreadsheet to correct the proportions of the PPS Pro solution accordingly. I thought this might come in handy for some others.

I also added the ability to make adjustments to each of the nutrients in case someone wanted to do so. The spreadsheet will take inputs for dose size, tank size, and how much you want to mix (I mix 3L at a time) and create the necessary calculatin of each nutrient.

Thoughts?
Attached Files
File Type: xls PPS Pro Autodoser Calculator.xls (24.0 KB, 371 views)
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Old 03-22-2008, 05:07 PM   #2 (permalink)
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Default Re: Autodosing PPS Pro

That is a very neat autodoser design. You could make the solutions by diluting standard PPS Pro solutions so each dose was 100 ml, but the spreadsheet idea is a good one too.
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Old 03-22-2008, 05:59 PM   #3 (permalink)
 
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Default Re: Autodosing PPS Pro

That's essentially what I did, I just made it more complicated. I tend to do that.

Here's a link to the Autodoser build.
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Old 03-22-2008, 06:04 PM   #4 (permalink)
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Default Re: Autodosing PPS Pro

I like this thanks, I don't always have time to dose my taks regularly with my job. any idea how long this 3L solution will last?
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Old 03-22-2008, 06:20 PM   #5 (permalink)
 
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Default Re: Autodosing PPS Pro

I'm still on my first run through a container full, so I don't know yet. Based on where I am vs. where I started, I would estimate 3 weeks.
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Old 03-22-2008, 06:59 PM   #6 (permalink)
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Default Re: Autodosing PPS Pro

so the pump sits inside the containers? Is there any variability with the amount dosed in a minute based on the amount in the containers? If not it's better than the Tom's aqualifter I've been using.
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Old 03-23-2008, 01:15 AM   #7 (permalink)
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Default Re: Autodosing PPS Pro

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Originally Posted by hooha View Post
so the pump sits inside the containers? Is there any variability with the amount dosed in a minute based on the amount in the containers? If not it's better than the Tom's aqualifter I've been using.
If there is a difference it seems to be minute. Several of our members are now employing this method of autodosing. The main concerns are to make sure that the lids don't allow for much evaporation and to not move it. The dosing is based on the head height / pump placement so you need to find it spot where it will live and not move it around in the stand. If you do move it you'll want to recalibrate it.
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Old 03-23-2008, 05:12 AM   #8 (permalink)
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Default Re: Autodosing PPS Pro

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Originally Posted by AaronT View Post
If there is a difference it seems to be minute. Several of our members are now employing this method of autodosing. The main concerns are to make sure that the lids don't allow for much evaporation and to not move it. The dosing is based on the head height / pump placement so you need to find it spot where it will live and not move it around in the stand. If you do move it you'll want to recalibrate it.
Thanks for that piece of advice, not sure where I can keep my containters if I do this as I run a sump that takes up my entire stand. I keep my CO2 tank in the basement directly below my tank and drill a hole up to the upstairs with the line through the floor.

Craig
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Old 03-23-2008, 04:28 PM   #9 (permalink)
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Default Re: Autodosing PPS Pro

Some people are keeping it next to the tank on a ledge, or you could build a shelf higher up in the stand.
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Old 03-29-2008, 08:14 PM   #10 (permalink)
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Default Re: Autodosing PPS Pro

i would like to try out this autodose system due to that i'm constantly not around during my light goes on but i'm not sure where to find these kind of motor that will pump as small as 1ml per pump......
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