Day or Night Skimming

Discussion in 'Protein Skimmers, Mechanical Filtration' started by Pads, 20 Oct 2009.

  1. Pads

    Pads

    Joined:
    18 Aug 2008
    Posts:
    689
    Likes Received:
    4
    Location:
    Joburg, Bryanston
    I've been looking through a few guys members threads and I see that different people skim at different times during the day. Some only skim at night and others during the day and I have mine running 24/7.

    What are the benefits of each?
    Turning the skimmer off during feeding is fairly straight forward, but I'm sure there many more reasons.

    Care to share??? ;)
     
  2. AdS Guest




    to hide all adverts.
  3. maj

    maj

    Joined:
    13 Oct 2009
    Posts:
    2,054
    Likes Received:
    17
    Location:
    Cape Town
    i too would like to know this?
     
  4. Mekaeel

    Mekaeel Moderator MASA Contributor

    Joined:
    8 May 2007
    Posts:
    24,229
    Likes Received:
    127
    Location:
    Point Waterfront Durban
    I run my skimmer 24/7. From my experience with running it 12 hours on and 12 hours off (experiment some years ago) , leads to a lot of detritus settling in the sump during the 'off' period. Is that what we want? In my case a no no......
     
  5. Prodigy

    Prodigy

    Joined:
    4 May 2009
    Posts:
    1,107
    Likes Received:
    1
    Location:
    Slums Baby!!!
    I skim 24/7
    You dont know when there will be stuff in the water for skimmer to take out so dont take chances....
     
  6. Pads

    Pads Thread Starter

    Joined:
    18 Aug 2008
    Posts:
    689
    Likes Received:
    4
    Location:
    Joburg, Bryanston
    The other thing I considered was if I were to only skim during the day how would I maintain the Oxygen levels in the tank over night?

    How much does surface agitation really diffuse oxygen into the system?
    Would I then need an air pump running in the evening?

    I've noticed that my current skimmer skims quite a few pods and gogga's. These seem to be nocturnal creatures thus leading me to think that if I skim during day light hours they wouldn't be removed...

    For sure I get that but does the DSB also need some food to survive. Otherwise the organisms in there die too? We can't allow the DSB to become an overnight dumping site but we also don't wanna skim out all the life.

    What u think?
     
  7. clinton stanford

    clinton stanford

    Joined:
    11 Mar 2009
    Posts:
    2,210
    Likes Received:
    4
    Location:
    East London
    very interesting! i also want to know about the DSB getting food.
     
  8. Mekaeel

    Mekaeel Moderator MASA Contributor

    Joined:
    8 May 2007
    Posts:
    24,229
    Likes Received:
    127
    Location:
    Point Waterfront Durban
    Makes sense Pads. But at the same time, remember, not all the water is passing that skimmer, lots of it is 'missed' by the skimmer and is therefore feeding your DSB.
     
  9. Broder

    Broder Mudshark

    Joined:
    13 Sep 2007
    Posts:
    2,087
    Likes Received:
    32
    Location:
    East London
    If you want to switch your skimmer off, do it during the night when your SPS corals have their polyps extended and are feeding.
     
  10. clinton stanford

    clinton stanford

    Joined:
    11 Mar 2009
    Posts:
    2,210
    Likes Received:
    4
    Location:
    East London
    sorry for hi jacking pads:) i have a stocking over my overflow pipe that goes into the sump and it catches excess food and all the dirt and stuff wich keeps my sump clean and stops splashing.but i wanto know...all that stuff wich is collected in the stocking would the DSB not need that to feed on? or would the DSB still get enough food? i have a huge amount of pods ect and they are all over the place.would that not be a sighn that there is a good balance in the sump?
     
  11. Pads

    Pads Thread Starter

    Joined:
    18 Aug 2008
    Posts:
    689
    Likes Received:
    4
    Location:
    Joburg, Bryanston
    No SPS yet but I hear what you saying.

    Apart from suspended faecal matter which should be lower during the night than the day. Presuming fishes don't "wet their beds" at night what other organic matter needs skimming?

    I can only think of algae spores and maybe some toxins from the corals if they occur.

    Would it not be sensible to skim up to an hour or two after lights out and start when lights come on?

    I'm not trying to evade the fact that the sump might become clogged up but there has to be a way to reduce the amount of critter we skim?
     
  12. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    23,163
    Likes Received:
    1,232
    Location:
    Centurion
    Depends on...
    Is the skimmer before or after the DSB?
    What types of coral and or softies you have?

    Mine is after. I want excess food to feed the DSB, why starve them, let them eat.
    And as I only have softies and leathers, I skim at night. So any beneficial larvae and pods release by the DSB during the day get a ride via return pump to display.

    So if you have corals that expand at night, then running the skimmer during the day is better.

    Also it helps a lot to have a small circulation pump running in the sump around the skimmer. It keeps things suspended. Check out comments made in this month Tank of the Month. One of the suggestions or pieces of advice given.

    Actually I realized that you should have a parallel sump. Overflow should split to two chambers. One a DSB and the other the skimmer. Both chambers then go to return pump. Dallas got this setup, but he split his overflow into 3 lines.
     
  13. Pads

    Pads Thread Starter

    Joined:
    18 Aug 2008
    Posts:
    689
    Likes Received:
    4
    Location:
    Joburg, Bryanston
    Skimmer before DSB. I suppose a good way to set up is,
    1) Overflow - Skimmer - Return
    2) Overflow - DSB - Return, and I'd have
    3) Overflow - Algae Scrubber - Return. All linking into one common Return Chamber.

    This does not solve the problem of the DSB being a detritus trap. Too much flow over it and there's not enough contact time and too little flow means nothing happens...
     
  14. Tony

    Tony

    Joined:
    23 Aug 2008
    Posts:
    4,093
    Likes Received:
    68
    Location:
    Honeydew, Johannesburg
    Run it 24/7. I only turn mine off for a few hours when I add bacteria
     
  15. jacquesb

    jacquesb Retired Moderator

    Joined:
    29 May 2007
    Posts:
    17,868
    Likes Received:
    69
    Location:
    Cape Town
    The only time my skimmers have ever been switched off, when there was a power failure. NEVER in between!
     
  16. Pads

    Pads Thread Starter

    Joined:
    18 Aug 2008
    Posts:
    689
    Likes Received:
    4
    Location:
    Joburg, Bryanston
    It seems as though most skim 24/7. But I don't want to adobt a mantra that I cant fully justify from my own experience. I guess its why you ask for advise from the "long in tooth". IMO I think this needs some more thought.
    Would it be so neccessary to reseed the DSB and add fresh LR if we weren't stripping the life from our reef before it has time to sustainably populate...
    In the wild nothing apart from predators removes life from the reef. Does a skimmer do it faster? Especially a strong one that can cope with our bio loads???
     
  17. martin

    martin Reef Adict

    Joined:
    8 Aug 2007
    Posts:
    397
    Likes Received:
    4
    Location:
    Faerie Glen Pretoria
    IMO & something not mentioned 24/7 is best because I don't believe in turning pumps on and of if they aren't pulsating pumps. Skimmer pumps are expensive and it will reduced their lifespan. Even when feeding I run it, but off for an hour or so when adding Prodibio and when cleaning so in total once a week +-. Also skimmers are one of the best forms of oxygenation and with Escoms reliability one never knows when Murphy might strike!
     
  18. Pads

    Pads Thread Starter

    Joined:
    18 Aug 2008
    Posts:
    689
    Likes Received:
    4
    Location:
    Joburg, Bryanston
    Good point, I can't say I accounted for the weathering of the pump with all the on/off cycles. Unless the skimmer was gravity fed but then it would run 24/7 in any case. Maybe I'll have to work on a skimmerless system... One day when my tank is big and I've got an auto water change system running. Thank for the input guys :thumbup:
     
Recent Posts

Loading...
Similar Threads - Night Skimming Forum Date
Moonlights all night long ? Lighting 15 Aug 2016
Disappointed tonight General Discussions and Advice 4 Nov 2015
Lighting research nightmare, please help General Discussions and Advice 6 Aug 2015
GUESS WHAT GUYS AND GALS!!!!!!!. ZEO IS HERE!!!!!!! Zeo party in my tank tonight... JungleAquatics.NET BLOG 16 Apr 2015
Hi I found my lawnmowe blennie sitting close to these eggs last night ID Needed 10 Mar 2015
Urgent help needed Dream tank turned into nightmare Urgent Help Needed 21 Dec 2014
Detailed form submitted: Midnight Reefer General Discussions and Advice 10 Dec 2014