4 Channel auto doser

[Vanish]

Had a search for the TMC ones and couldn't find them. I did find these though
http://pages.ebay.com/link/?nav=item.view&alt=web&id=400443795036
How do they compare price wise?


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[Nuno M.]

TMC ones cost me 4,2€ each, more expensive than those 😉

 

[Colinlp]

I couldn't find them either, not pretty things the TMC vales. How about these from CO2 Art, they're gravity activated

 

[Greenfinger2]

Hi All great thread This bit of kit is now on my shopping list 😀 The photo above looks cool for a non return valve. Cannot see why it would not work ?? Great idea Colinlp.

 

[ian_m]

How about these from CO2 Art, they're gravity activated

Might the plastic bit float if full of liquid, defeating the one way'ness ?

 

[Dan-CR4]

how about these ones? http://www.ebay.co.uk/itm/Windscree...t=LH_DefaultDomain_3&var=&hash=item3ce36f9e7c

but does say * Not certified for Food Contact Use 🙁

 

[ian_m]

how about these ones? http://www.ebay.co.uk/itm/Windscree...t=LH_DefaultDomain_3&var=&hash=item3ce36f9e7c

Just the job. The food use bit would be human consumption, not plant.😀.

Remember cable ties to hold tube in place.

or use these, preferably stainless versions.
http://www.ebay.co.uk/itm/10-x-6mm-...677?pt=LH_DefaultDomain_3&hash=item3a5ad9167d[/quote]

 

[Colinlp]

Might the plastic bit float if full of liquid, defeating the one way'ness ?

The insert is glass I think, I have one on my CO2 and it didn't float when the chamber was flooded in testing

 

[Ryan Thang To]

As anyone used one of these?

http://www.ebay.co.uk/itm/Jebao-DP-...243?pt=LH_DefaultDomain_0&hash=item4ae1a7b493

Cheap for what they are!

Paulo are you getting one? im looking to buy one

 

[LondonDragon]

Paulo are you getting one? im looking to buy one

Not at the moment, I have built a couple of pumps with 4 rollers,just like how this one looks nice and tidy and you can dose multiple things into the tank, micro,macro, LC, extra iron? works well with 4 dosers. Need to buy a new tank first 🙂

 

[Ryan Thang To]

Not at the moment, I have built a couple of pumps with 4 rollers,just like how this one looks nice and tidy and you can dose multiple things into the tank, micro,macro, LC, extra iron? works well with 4 dosers. Need to buy a new tank first 🙂

oh nice! any chance showing us how its made I like doing diy stuff lol

 

[Konrad Michalski]

Hi all. I just got my pump and will be installing it soon. Could I use polyurethane tube for this purpose? Normal 6mm tube seems to be very soft and too flexible. I'm a bit scared it may fold somewhere and get blocked. Cheers

 

[ian_m]

I just used 4/6mm PVC tubing on mine. No had any issues of "folding" as tube is quite tough.

 

[Konrad Michalski]

I just used 4/6mm PVC tubing on mine. No had any issues of "folding" as tube is quite tough.

The one I bought seems to be way too soft

 

[ian_m]

Well what ever my tube is not had any kink issues, maybe PVC is stronger.

Below are pics of the two ends of the system.

 

[Konrad Michalski]

Thanks for sharing photos. I will look around in DIY shops and see what I can get.

 

[Vanish]

Hi Konrad, I can't see a problem with you using polyurethane tube, ultimately it will only be carrying a salty water. I used beer line as this is too stiff to kink. I also put a small amount of ptfe grease onto the silicone tube inside the pump head to guard against the mechanical stress of the bearings operating against the tube. This has not affected the operation of the pump and I have read that is indeed a recommended addition to some of the larger peristaltic pumps.
Here a link to some of the type of tubing that I used.
http://pages.ebay.com/link/?nav=item.view&alt=web&id=111110659749



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[Konrad Michalski]

Thanks a lot. I will go for that then. What about measuring bottles, do you use any or just normal bottles?Cheers

 

[Colinlp]

I've just had the 2 pump version delivered for my new tank. The pumps are 3 blade and the contact surface is about 200 - 220 degrees so I doubt there is any need for one way stops to stop back flow

 

[Ryan Thang To]

hey guys
i was wondering if anyone can help. how do I set marco and mirco to dose every after day?

cheers
ryan