The Reef Octopus Clan

Discussion in 'Protein Skimmers, Mechanical Filtration' started by Alan, 22 Oct 2007.

  1. Alan

    Alan Admin MASA Contributor

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    Just thought i would share what my RO 250 is doing after all the mods. Firstly i don't have pics of what it looked like new before any mods, sorry.
    First mod was replace the flat washer with an o ring
    Second mod was the mesh wheel mod and this is what the skimmer looked like

    [​IMG]

    I was bored on Sunday after all the excitement of the rugby, so decided to fiddle with the skimmer. I enlarged the venturi's and cut out the "T" pieces on the inside that the recirculation pumps feed through and replace them with 45deg bends and this is what i ended up with.

    [​IMG]

    Unfortunately i don't have a better pic of the skimmer before the above conversion but you can see how much further the bubbles move down the chamber if you compare the 2 pics.
    Just to give folk an idea of the size of this skimmer here is a pic, with the skimmer and a 25L drum next to each other

    [​IMG]

    This is what the foam looks like at the moment, not easy to take a pic as it wont keep still.

    [​IMG]

    I really enjoy these skimmers as there is so much to play with and mod, not that they need it but it still is fun.
    What next? Been thinking about re-plumbing the inlets to the recirc pumps and maybe get an extra 15% water flow as more water flow=more air drawn into the skimmer.
     
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  3. Tridan

    Tridan

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    Really cool i think i ned to get a bigger skimmer after seeing that
     
  4. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Alan the skimmer pimp :lol:
    good stuff man.any particular reason why you replaced the flat washer with the O ring?
     
  5. Alan

    Alan Thread Starter Admin MASA Contributor

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    Yip, the flat washer partially covers the venturie outlet and restricts the airflow into the recirc pumps.
     
  6. Mekaeel

    Mekaeel Moderator MASA Contributor

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    oh yes i did that to mines aswell.sorry was thinking about something else
     
  7. viper357

    viper357 Admin MASA Contributor

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    How did you enlarge the venturi's? Simply drilled them bigger? Are you talking about where the hole goes through the grey part on the pump?
     
  8. Alan

    Alan Thread Starter Admin MASA Contributor

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    Yes, but mainly the hole where it exits into the pump, this has to be done very carefully though as you dont want to break through into the venturi itself.
     
  9. SIMS

    SIMS

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    Um Alan how did you change the T's? You think it's possible to try with mine? I'm upgrading my pump to a OR3500 because I'm sick of the noise.... how and where do I drill the venturi? How do you plan on replumbing the skimmer pumps?
     
  10. Alan

    Alan Thread Starter Admin MASA Contributor

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    I had to cut them out as they are glued.
    We can, what RO skimmer have you got Sims?
    You will see the venturi opening when you strip the skimmer. Sims did you do the O ring mod to your skimmer?
    I want to re plum the feed to the pumps and replace with larger piping and a soft 90deg elbow not the sharp bend.
     
  11. SIMS

    SIMS

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    Questions below

     
  12. millepora

    millepora

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    Excellent stuff Alan, there certainly looks like there is a nice difference. Please let us know how the skimmer performs over the next couple of weeks. Do you know what the actual size is of the O rings are? I want to start replacing washers for O rings on the skimmers that I sell. I may also get a collection of all the better mods and make prints to add to all the skimmer boxes. Thanks for the continued R&D;)
     
  13. Alan

    Alan Thread Starter Admin MASA Contributor

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    Sims you will find the washer between the pump and the actual venturi, it is in the area where the air exists the venturi and enters the mixing chamber of the pump.
     
  14. SIMS

    SIMS

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    Cool I'll give it a bash tonight....
     
  15. Alan

    Alan Thread Starter Admin MASA Contributor

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    Sorry forgot to mention that this is the skimmer where the feed pump burnt out the other day, so replaced it with a ATI 5800L/Ph, so the water is flowing through the skimmer fairly quickly.
     
  16. SIMS

    SIMS

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    Wow that's alot of flow through the skimmer.... I have mine feeding from the overflow but when I setup the new tank I plan on a feed pump of 2500l....
     
  17. Alan

    Alan Thread Starter Admin MASA Contributor

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    Hey Sims did you manage to find the washer and replace with an o ring?
     
  18. SIMS

    SIMS

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    Hey Alan - No I did not I used up all my strength doing a 200l water change on Sunday so have it in my diary to strip and clean the skimmer either tonight or Wednesday night. I'll do the washer mod and the mesh mod when the pump is off... hope you don't mind but if I get stuck I may be forced to call you for help :) ...
     
  19. SIMS

    SIMS

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    PS any ideas what size o ring i'll need?
     
  20. jacquesb

    jacquesb Retired Moderator

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    Hi Alan, et al...

    How long does it take for one of your skimmers to get back to "full production" once you have messed with it? (cleaned it, modded pump, etc, etc, etc)??

    Thanks, Jacques
     
  21. Alan

    Alan Thread Starter Admin MASA Contributor

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    If i have just cleaned the cup 5 min, if i have really messed around with it, mods etc, it generally takes a couple of hours to start skimming properly. feeding flake and pellets also takes about a hour.
     
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