1. jean19


    21 Sep 2009
    Likes Received:
    france .
    when calculating the flow , should i take the full volume off the tank or just the amount of water .
    it's for a 120 x 60 x 60 , with 12/15cm of sand + LR , it will be my DT not a sump .
    merci .
  2. AdS Guest

    to hide all adverts.
  3. Tobes

    Tobes Retired Moderator

    30 Nov 2007
    Likes Received:
    A Beautiful place!
    Flow over a DSB in a sump needs to be about 3 - 5 times the total system water volume.
    In your case when having an "in tank" DSB it does not matter if you don't have a sump as the flow inside the tank needs to be adequite for the type of corals you keep.
    If you have a sump that house the skimmer and the DSB is in the DT, then I would still recommend a 3 - 5 times flow so that the skimmer can remove more waiste.
    I use water volume for my calculations.
Recent Posts

Similar Threads - flow Forum Date
[wtd] Overflow box/DIY pvc overflow Wanted 4 Jan 2017
Urgent help needed Overflow not flowing Urgent Help Needed 2 Jan 2017
Overflowing skimmer General Discussions and Advice 18 Dec 2016
Overflowing skimmer Curve7 - 2 days Protein Skimmers, Mechanical Filtration 6 Dec 2016
Wanted!! Wavemaker/ flow pump Wanted 5 Dec 2016
Overflow fitting help please Pumps and Waterflow 30 Nov 2016
Flow rate of pvc pipe Anything DIY Related 10 Nov 2016