Quick question about doser units.

[DeadlyFoez]

Ok, I built this doser unit to use with my growtronix system to give ph and ph down when needed. I am using peristaltic pumps and tygon lfl tubing. My question is, should I have the end of my tube in the water of my resivior or should I dangle it above and have my ph adjusters just drip into the water.

The reason why I ask is because I am swamp cooling my resivior and if I dangle above I'm afraid that the ph adjusters might dry up at the end and eventually clogged if not being used enough. But on the other hand, I dont know if dangling it into the nutrient solution, through some law of physics, might cause the flow that I got going around to pull some more ph adjuster out of the tube than what is intended.

Please answer my simple question for those of you that know. Thanx.

 

[BudGood2006]

Damn, sounds cool. Are you going to post a tutorial???

 

[DeadlyFoez]

someday, not now though. I wanna get it finished and get my second cab up and running abd take plenty of pics before making a tut.

 

[bounty29]

Sorry it's off topic, but does this mean you finally got the situation resolved and got that final piece in the mail?

 

[Buzzsmirk!]

once the ph adjust contacts 5the res water danglin OR dipped it becomes part of the solution as a whole and adjusts the desired direction on the ph scale u r desire it to.

ive thought about these things but i was worried if the unit malfunctioned and dumped a bunch of ph adjust into my res and fryin/killin my ladies (risk management)

i would recommend u think of failsafe features in your set to prevent this scenario.
BUZZ!

 

[DeadlyFoez]

No bounty, I haven't gotten it in the mail yet. I might have to wait up to another 2 months. URGHHH!!!! That will make it so complete, but I still had other things to do, like set up the doser, so I just got that out of the way so once its in the mail I'll be able to just plug it in and go.

Buzz, I think you minght need to reread my question. I wasn't asking about the reaction of the ph adjuster in the nutrient solution, what I am trying to ask is what would be better to do with the end on the tubes that the the ph adjusters come out of.

Senario 1:
I dangle the tubes into the nutrient solution, but I've got a lot of water flow going on (a 275 gph with only about 18 gallons total in my system) and posibly risk that the flow migh cause more ph than is deisred to be pulled out and through things off. Or...

Senario 2: I have the tubes hangin above the solution, and since I'm swamp cooling with a fan blowing on things, take a risk that some of that ph adjuster and then end of the tube dry up and clog the tube eventually if one of the adjusters isn't used as much as the other.

I'm not concerned about too much ph adjuster being released from something messing up. Things are setup in a way that my chances of it happening are extremely low. But I bought my peristaltic pump to only discharge about 1.3 ml per minute which is damn slow. It takes about 1 minute for my ph to adjust 0.1 thoughout my system when using the peristaltic pumps.

 

[Buzzsmirk!]

hi, i have no experience w/ swamp coolers except readin about em.
i would recommend dippin in in your res solution but these tubes must be pretty small if ur worried about them caking up w/ dried adjuster, must be quite a breeze in that cab. do you cover ur res????
i read u r worried a dipped tube will "siphon" adjuster through the pump. is that correct??? i have no real experience with the pump u r using but i doubt u would siphon
witha dipped tube . i think a test is in order for you to find out (use water in the bottle) intead of agent and watch it for a few days (turn off ur circuit that pumps while u "test" in the "off" mode) i would like to know how that come out!!
BUZZ!

 

[Kabelbrand]

I have no problems with the water flow and the pH-adjuster - even when the drippers are just hangig in the water.

A very exact way to add the acid is a mixing-pipe with metering behind the drippers. But thats quite loud ... .

 

[DeadlyFoez]

Thanx for the info. Now, y use a mixing pipe? I have my res setup so it will evenly rescirculates everything. Theres no spots in my res that doesn't get exchanged as evenly as everything else. You get what I mean?? I'm usually kinda confusing.

My res is outside my cab. But I got a 6" Vortex fan to exhaust my cab and to cool my lights. The thing is, theres only 2 holes for air intake, one is plugges almost full with wires and hoses, the other air intake hole in my c24 I have the exhaust from my res for the swamp cooling going into to help add humidity into my room.

 

[Kabelbrand]

I used mixing-pipe with systems often watered, like NFT or Aeroflo.
I used it wihout mixing-pipe in systems watered in slower cycles, like ebb/flow.

Both works. The mixing-pipe is faster and more to the point, but the difference in a small and good ricurculated reservoir is not big.

May you can just put the end of the dripper in a hole of the ricurculating-pump-tube ... .

P.S.:
I saw you use pH+. I only made experience with acid-drippers in the pipe. Don´t know if pH+ reacts different ... .