Results 1 to 19 of 19

Thread: PMUP and Kalkwasser

  1. #1
    NSI Member
    Join Date
    Aug 2016
    Location
    Minneapolis, MN
    Posts
    8

    PMUP and Kalkwasser

    Seriously considering for use in a Kalkwasser resevoir.

    Any ideas if this pump will hold up in kalkwasser high pH conditions ?

  2. #2
    NSI Member
    Join Date
    Apr 2013
    Location
    Santa Cruz, CA
    Posts
    1,910
    My recommendation if you have not thought of this already is to put a valve on the outlet tubing of the PMUP so you can drip Kalk instead of flowing Kalk into your tank. This way you can protect your tank if there was ever a failure.
    Jon
    ***RIP*** to Reeftronics that has saved me more then once and was a great place to look at other peoples programming to get many ideas I use on my own tank. Thanks Russ for all the years of keeping up this great service free of charge to us users that took it for granted like me .

  3. #3
    NSI Member
    Join Date
    Aug 2016
    Location
    Minneapolis, MN
    Posts
    8
    I've got all that covered been doing using kalkwasser for 13 years, im in IT so I'm all about redundancy. BRS 50ml dosing pump don't seem to last much longer than 18months the plastic gears strip out plus running 2-3 gallons per day probably doesn't help the wear and tear on the BRS dosing pump. Been using aqualifter on a 5 seconds on 5minutes ( varies depending on alk levels ) off during lights out period until I decide a replacement. Just wondering about the exposure to kalkwasser so long as keep the bottom out of the carbonate precipitant.

  4. #4
    NSI Member
    Join Date
    Nov 2015
    Location
    Minneapolis, MN USA
    Posts
    192
    Great question David. This is something I'd like to know as well since I use Kalk for my top off and am upgrading to a Neptune controlled system. With their new ATO kit and some programming it probably could be set to turn on for only a few seconds every hour from 20:00 - 8:00 if water level < optical sensor.

    The pump does 100gph though compared to the 50ml doser we've used. So this thing can only be on for a very short time. The main intack is on the very bottom of the pump which is great for standard ATO but will sit right in the slurry of Kalk. You'd probably need to a little 2-4" acrylic stand for it to sit on inside the container.

    https://www.neptunesystems.com/pmup/

    What other equipment were you thinking about getting David? wink wink

  5. #5
    Fish Whisperer cypherljk's Avatar
    Join Date
    Oct 2013
    Location
    Charlotte, NC
    Posts
    448
    Quote Originally Posted by eschulist View Post
    Great question David. This is something I'd like to know as well since I use Kalk for my top off and am upgrading to a Neptune controlled system. With their new ATO kit and some programming it probably could be set to turn on for only a few seconds every hour from 20:00 - 8:00 if water level < optical sensor.

    The pump does 100gph though compared to the 50ml doser we've used. So this thing can only be on for a very short time. The main intack is on the very bottom of the pump which is great for standard ATO but will sit right in the slurry of Kalk. You'd probably need to a little 2-4" acrylic stand for it to sit on inside the container.

    https://www.neptunesystems.com/pmup/

    What other equipment were you thinking about getting David? wink wink
    Just to tack on to that thought about the slurry in the bottom of the container, I use a power head which runs for a few minutes before my top off pump is cut on to mix up the precipitation.

  6. #6
    NSI Member
    Join Date
    Nov 2015
    Location
    Minneapolis, MN USA
    Posts
    192
    Quote Originally Posted by cypherljk View Post
    Just to tack on to that thought about the slurry in the bottom of the container, I use a power head which runs for a few minutes before my top off pump is cut on to mix up the precipitation.
    Wouldn't that cause all of the precipitant to just become suspended in the water when its drawn out. I've aways been under the assumption that once the water is well mixed with the Kalk it is saturated and that the rest settles out on the bottom. This bottom slurry is just garbage and as long as you are sucking up the clear saturated water you are good to go. Adding the precipitant to the tank is just putting it in the bottom of your sump or in the sand where it will build up.

  7. #7
    NSI Member
    Join Date
    Aug 2016
    Location
    Minneapolis, MN
    Posts
    8
    You never want to mix the resevoir until it's time to refill. Mix once and let it sit until time to refill. Anytime your stir it up your potentially adding co2 which will make it less potent. If you want to test it, use a conductivity meter not a pH meter. The precipant on the bottom is not soluable.

  8. #8
    New User
    Join Date
    Sep 2016
    Location
    Belchertown, MA
    Posts
    5
    I thought you wanted the mix to settle before dosing it.

    Sent from my SAMSUNG-SM-G890A using Tapatalk

  9. #9
    NSI Member
    Join Date
    Aug 2016
    Location
    Minneapolis, MN
    Posts
    8
    Maybe I misunderstood. Yes, the initial mix. Then leave it sit until time to refill again. You do not want to stir or mix everytime the pump is to topoff.

  10. #10
    Fish Whisperer cypherljk's Avatar
    Join Date
    Oct 2013
    Location
    Charlotte, NC
    Posts
    448
    Quote Originally Posted by eschulist View Post
    Wouldn't that cause all of the precipitant to just become suspended in the water when its drawn out. I've aways been under the assumption that once the water is well mixed with the Kalk it is saturated and that the rest settles out on the bottom. This bottom slurry is just garbage and as long as you are sucking up the clear saturated water you are good to go. Adding the precipitant to the tank is just putting it in the bottom of your sump or in the sand where it will build up.
    Interesting I will have to investigate. The precip never gets to the sump because I use a pre-filter on the line in-between the ATO and the pump. I will check the info about saturation though.

  11. #11
    NSI Member
    Join Date
    Aug 2016
    Location
    Minneapolis, MN
    Posts
    8
    I built a cage for around the pump out of 3" pvc and end caps to keep the pump out of the carbonate precip on the bottom of the reservoir. Can dial it down pretty well with 1/4" ball valve.

    Its only been about a week. Will see how it goes. Likely will just buy a replacement dosing pump for the long term but will see how it goes I might be surprised.

  12. #12
    Regular Vistor
    Join Date
    Apr 2016
    Location
    Florida/Central
    Posts
    35
    I currently use a Aqualifter pump to add my Kalk. It's controlled via my APEX to add a set amount every 1/2 hour. Works great.

    I would like to know if others have success with the PMUP dosing Kalk.

    Is the PMUP conpatable with the Gold APEX system or do I have to add a module?



    Sent from my iPhone using Tapatalk

  13. #13
    Frequent Visitor
    Join Date
    May 2014
    Location
    Portugal
    Posts
    219
    Hello,

    What is the durability of the pump in those conditions where you are using it inside the Kalk vessel?
    I used to use like that the tunze 9v pump just to realize those didn't last long ... I moved to a Kalk reactor just because of that.

    All the best,
    Rui

  14. #14
    Regular Vistor
    Join Date
    Apr 2016
    Location
    Florida/Central
    Posts
    35
    Quote Originally Posted by Rui Manuel Gaspar View Post
    Hello,

    What is the durability of the pump in those conditions where you are using it inside the Kalk vessel?
    I used to use like that the tunze 9v pump just to realize those didn't last long ... I moved to a Kalk reactor just because of that.

    All the best,
    Rui
    I worry about that too, maybe that is why the Aqualifter is such a good pump for this type of thing. I mount the pump about the container and pulls the Kalk through the pump. Works well but the flow rate changes as the water level drops that the pump has to pull the Kalk higher. So far has been reliable.


    Sent from my iPhone using Tapatalk

  15. #15
    NSI Member
    Join Date
    Aug 2016
    Location
    Minneapolis, MN
    Posts
    8
    The New apex has the connectors built into the eb8. The classic gold for sure requires the module.

    Only time will tell and that's really what this is all about. Years ago before dosing pumps were commonly used I ran kalkwasser with a Maxijet pump and they would last a couple years before the kalkwasser finally make the glue that holds the magnet to the impeller give out. I haven't opened up the PMUP to see exactly how the impeller is constructed yet. I'll try not to becomes a "LARS" and soak in vinegar often.

    I've been through several dosing pumps and get on average about 18months out of them before the gears wear out or some other failures and they run about $80. If can get to last about that long then it's a win.

    I did try a 1/4" check valve ( for ro units ) and there must not be enough back pressure for it to work so it will reverse if your not careful. So just like aqualifter keep the output above your resevoir and not in under the water level or it will back siphon.

  16. #16
    Regular Vistor
    Join Date
    Oct 2016
    Location
    MST
    Posts
    24
    Have you considered using a Nielson reactor and using a DOS to pump rodi water into it and not having the pump in the Kalk? (and not having to mix up batches of kalkwassrer)

  17. #17
    Frequent Visitor
    Join Date
    Oct 2013
    Location
    Cheshire, CT
    Posts
    51
    David - Now that almost a year has gone by, can you give an update on how the PMUP has done with kalk? I'm just now setting up the same thing.

    can you also tell me more about the cage you built for the PMUP using 3" pvc? I need something to ensure the pump doesn't get into the sludge at the bottom of the Brute trash barrel. I had hoped that I could just keep the ro tubing short enough to keep it out but it seems that the connectors won't hold and support the pump. So I need a platform of some type that will still allow me to stir the freshly mixed kalk (I stir it manually using a long length of pvc since it only has to be done when it's refilled).

  18. #18
    Regular Vistor
    Join Date
    Apr 2017
    Location
    California
    Posts
    17
    @David. Im in the same boat as Mickey. Would love an update on how your PMUP is holding up in Kalk

  19. #19
    Frequent Visitor
    Join Date
    Sep 2013
    Location
    Seattle, Wa
    Posts
    71
    Tuning in here as well


    Sent from my iPad using Tapatalk

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •