Tank Journal - No Tank

Discussion in 'Tank Journals' started by Bruce Spiegelman, May 19, 2019.

  1. Vhuang168

    Vhuang168 Supporting Member

    The issue is turnover of the whole tank volume. You can run water slowly through the UV and it will kill everything going through it, but 50gph for a 500g tank is not going to cut it.

    I don't know what the best is for that.

    Sent from my iPhone using Tapatalk Pro
  2. Oakland Evan

    Oakland Evan Supporting Member

    Total tank turnover or just turnover through the UV? I was thinking of just adding a super small pump and running it through my UV and directly back to the sump
  3. You want to run it slow enough to kill the protozoa, but you also need to move the total tank volume through often enough that you'll capture everything. I look at manufacturer specs for sterilization and then choose the lowest recommended.
  4. JVU


    Also the sterilizer is imparting however many watts of heat into the water, quartz sleeve, and casing, and you need a certain minimum amount of flowing water to dissipate it before it causes damage.
  5. RandyC

    RandyC Supporting Member

    Tank turn over. If you have too little volume going through the UV sterilizer, then the reproduction rate in the tank will outpace what you're killing in the UV sterilizer and UV will essentially be useless.
  6. But all these numbers are "known numbers" if you research it. This is well-developed science used worldwide in waste management, etc
  7. sfsuphysics

    sfsuphysics Supporting Member

    What's the reasoning here? Triton sump is for big ball of macro algae, but still feel the need for an algae scrubber?
  8. RandyC

    RandyC Supporting Member


    "Use of ultraviolet (UV) sterilization to kill theronts has been suggested, based on research involving Ichthyophthirius multifiliis (freshwater "ich"). The recommended UV dose for Ichthyophthirius theronts is 100,000 µWsec/cm2 (Hoffman 1974). However, UV doses required for Cryptocaryon irritans are anecdotal or extrapolated, and range from 280,000 µWsec/cm2(industry numbers) to 800,000 µWsec/cm2 (Colorni and Burgess 1997)."
  9. jccaclimber

    jccaclimber Supporting Member

    I'm not understanding from this why 1 large return pump instead of 2 medium sized ones on independent return paths.

    I'm assuming so, but just to confirm, you also lose the 0-10V moving to the EL, but for your wants it seems pretty reasonable. Even if you wanted the 0-10 V or the ORP/a backup pH probe you could get a PM1, a VDM, the probe. and still be ahead vs. the full.
  10. Oakland Evan

    Oakland Evan Supporting Member

    OH, Thanks, much clearer now!
  11. Coral reefer

    Coral reefer Past President

    so what’s that wind up meaning in watts needed for like 300-400 gph flow rate? I have no idea how to calculate that.
  12. RandyC

    RandyC Supporting Member

    It would depend on your manufacturer and model.

    For example, Aqua Ultraviolet, a Classic 57W would probably put 300 GPH at ~320,000 uw/cm2.

    Screen Shot 2019-05-19 at 11.08.41 PM.png

    A PentAir (Emperor) High output 50 watt at 300gph would probably be around 200,000 uw/cm2

    Screen Shot 2019-05-19 at 11.12.21 PM.png

    A PentAir SmartUV 40 Watt, woudl be around 200,000 uw/cm2

    Screen Shot 2019-05-19 at 11.20.51 PM.png
    Last edited: May 19, 2019
    Coral reefer likes this.
  13. Apon

    Apon Supporting Member

    Looks like a fun build!
  14. nly04

    nly04 Guest

    Will Orphek Atlantik cover the 36" width tank? Boun is selling three of his Mitras LX7026, this may do justice for this tank.
  15. Oakland Evan

    Oakland Evan Supporting Member

    I found this for the Coralife UV sterilizers. Interesting that Coralife recommends 400-1200 gph (for the 12x), but the chart shows that to kill parasites, it needs to be at 290gph. UV Sterilizer Flow Rate Chart.png
  16. RandyC

    RandyC Supporting Member

    I'm sure some parasites will die, but that's a pretty general term.

    Ich is one of the larger parasites. In the UV world, the bigger it is, the more UV it'll take to kill it. So at 45,000 uws/cm2, that isn't a level at which marine ich dinspores (free swimming phase) are killed. The studies I've read range a bit, but the minimum was 280,000 uws/cm2.

    Unfortunately, it seems to get to that amount of output though, the coralife flow rate would need to be real low in which case you'd run into problems without enough tank turnover.
    Coral reefer likes this.
  17. sfsuphysics

    sfsuphysics Supporting Member

    Is he? Doesn't like the spread of them? Or something else?

    I was seriously considering those as an option for my tank, but it's also 36" wide. Plus think about these fixtures long enough, then BAM they increase in price 10% because, which makes me reconsider the options.
    Last edited: May 20, 2019
  18. It's a good question, but I think so. They indicate they will do 48, and then in the same breath say that 40" is better. My plan is to run three of them lengthwise (long side front to back.) So I think is should be fine. If not, I may add a fourth. Again though, I could supplement with my existing kessils as well.
  19. nly04

    nly04 Guest

    He is trying to trade Mitras for Radion since the Mitras is over kill for this new tank. I would scope them up if I am that handy and has budget. pm him for more info.
  20. Chromis

    Chromis Supporting Member

    I’m curious how people move water effectively in a tank that size. I am a big fan of Gyres in any case but how would you place them? For peninsula tanks, Coralvue has recommended placing both Gyres on the back panel with one placed horizontal in the middle and one vertical toward the side. I wonder if you could treat a tank that long with a peninsula config on one end, and regular config (horizontal near top) on the other?

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