Sump layout

Discussion in 'Biological/Natural Filtration and Deep Sand Beds' started by gaboon, 17 Dec 2007.

  1. gaboon

    gaboon

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    As discussed in another thread, I was going to do the dsb in the display but the argonite will cost about R1500 so I've scrapped that idea. I want to modify my sump as follows:

    [​IMG]

    Have I missed anything?
     
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  3. Shaun

    Shaun Retired Moderator

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    If it was me I would put the heater in the 1st chamber, just in case the water level drops too low and the heater is on. you may have a problem.

    My 2c
     
  4. Kanga

    Kanga Retired Moderator MASA Contributor

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    Your 2c could be worth a lot more if that heater goes in the return chamber

    Yes it seems fine but I agree with Thalion heater in chamber 1 or 2
     
  5. viper357

    viper357 Admin MASA Contributor

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    Agree with Thalion.
     
  6. gaboon

    gaboon Thread Starter

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    Cool, done.
     
  7. SIMS

    SIMS

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    I plan the same with my skimmer returning over the dsb just worried what happens if the return pump fails...then you skimmer feed pump will run dry?
     
  8. Mekaeel

    Mekaeel Moderator MASA Contributor

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    yeah chamber 1 for the heater
     
  9. Kanga

    Kanga Retired Moderator MASA Contributor

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    You had me thinking there, however it wont. If the return pump fails, whatever water is in the sump will stay there


    You could even make the first pane 5mm lower than the last, thus it will flow back to the skimmer pump
     
  10. gaboon

    gaboon Thread Starter

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    Kanga, dumb question: how will the water flow into the return chamber then?
     
  11. Kanga

    Kanga Retired Moderator MASA Contributor

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    Sims wanted to know whether the skimer pump in chamber one would run dry.

    Thing is if pane 1 is 5 mm longer and unless the pump is of for days and your auto top up stops, The level will stay constant between the skimmer chamber and the DSB chamber.

    i.e. if there is enough water to will 2 chambers the will even out all the time regardless of how much you pump from one to the other chamber

    Hope that explains it:)
     
  12. gaboon

    gaboon Thread Starter

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    Cool thanks Kanga, I really need to see things like this in action to properly understand it. next question: is there a minimum size for the skimmer chamber.

    I want to maximise my space for the dsb

    [​IMG]
     
  13. gaboon

    gaboon Thread Starter

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    Would obviously have the make the skimmer chamber a bit bigger to accomodate the heater
     
  14. SIMS

    SIMS

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    Knga I still don't get it... if it's done like that surly the evaporated water will not alway's come from the return chamber?

    Sorry if I'm being stufid |I just need to get this?
     
  15. Galibore

    Galibore Retired Moderator

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    Bigger is better as you will have better settlement. Smaller = Water moving faster through it. (Velocity, not L/H). I use my skimmer chamber as a settlement area. It becomes the only area really that I ever need to vacume.
     
  16. gaboon

    gaboon Thread Starter

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    Thanks Galibore, if the dsb is ±20cm deep, is a cm depth of water flowing over it enough?
     
  17. Galibore

    Galibore Retired Moderator

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    Shew that might be way too shallow. I'm no expert here but I think you will nee a bit more depth on top of your DSB. Maybe wait for a guru to reply.
     
  18. Kanga

    Kanga Retired Moderator MASA Contributor

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    Right in normal operation, water will from A to B to C, therefore evapration will be evident in chamber C because flow will fill up A first the B etc.

    Ok back to your question

    if the return pump fails for whatever reason, flow from the tank will stop, hence water level in A and B will be the same as glass pane 2 (whatever is more will run will run into chamber C) and if there id back siphon from the return pipe and the levels go over panes 1 and 2 the point is moot:))

    Right skimmer pumps from chamber A and outlet in chamber B. If pane 1 is 5mm lower than 2, water will rise in B running back into A i.e. creating a cycle

    Hope that makes sense.

    If evaporation drops chamber A while the return pump is off enough to run it dry, a burned pump is going to be the least of your problems as this will take a day or 2 unless you stay the Kalahari desert with a RH of 5% :)

    HTH





    [​IMG]
     
  19. Kanga

    Kanga Retired Moderator MASA Contributor

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    I think Gali is much more of a DSB expert than what he claims:). I agree 1 cm is way to little, have 10 cm to 20 cm flowing over it
     
  20. gaboon

    gaboon Thread Starter

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    Kanga, if pane 1 is 5mm lower than pane 2, how will water flow into return pump chamber?
     
  21. Kanga

    Kanga Retired Moderator MASA Contributor

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    as water comes from the tank fed by the return pump in C, the waterlevel will rise to pane 2's level and flow over, with the water level being 5 mm over pane 1 ;)
     
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