Alkalinity sps tanks

Discussion in 'General Reef Discussion' started by Nickz, Mar 10, 2020.

  1. Nickz

    Nickz Nobody
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    At a time where I get to reset what I keep my levels at I figured it could be prudent to see what others are keeping their alkalinity at. Mine used to run 10.5dkh with kalkwasser, and everything was doing great until I lost a battle with stn/rtn from the base up. I went so far as to dose the entire reef with anti bacterial (gram negative and positive) in a last ditch effort in case it was bacterial (don't do that!). I have since been moving towards 9.5dkh. Just wondering if I should stay at that or consider lower. I figure this is the time to reset if I'm going to.

    I will add that my system is not ULN
     
  2. Fishfoo

    Fishfoo I contributed!
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  3. RSnodgrass

    RSnodgrass TCMAS President
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  4. HouseofStark

    HouseofStark I contributed!
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    I was told 8.3 - 8.5 is the sweet/safe spot
     
  5. DarkSky

    DarkSky Administrator
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    I kept mine at 8.5 dKH when I was running 0 NO3 / 0.15 P04.

    Now that I'm keeping my nitrates at 5-10ppm, I've been increasing my alk to 9.5 over a couple weeks. I'm at 9.23 dKH right now and should get there by this weekend.

    alk-graph.png

    I'm planning to get to 10 - 10.5 eventually, but I figure I'll hold at 9.5 for awhile and see how things ago.

    I think if you're making sure that your nitrates and phosphates are elevated and above a zero value, you should be able to run higher alkalinity just fine.

    If your goal is to slow growth, you can go with a lower alkalinity level.
     
  6. OP
    Nickz

    Nickz Nobody
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    Pretty sure I don't want to slow growth, just thought 10.5 sounded way high compared to what it seems most keep theirs at. I know it was going great for months and months at that for me. Maybe I should just put it back at 10.5. I'm honestly not sure how low I'll actually be able to get it using reef crystals.
     
  7. Ben Nicholls

    Ben Nicholls TCMAS Old Timer
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    I've had so much trouble with precipitation on my pumps and Wavs I've lowered down to 8.0.
     
  8. csb123

    csb123 Senior Member
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    I like 8.3-8.5....less chance of an alk spike which burns tips.
     
  9. spsick

    spsick Acro-poor-a
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    As much as I’ve tried going higher I always end up back around 7.0
     
  10. abhishek

    abhishek Senior Member
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    Well there’s ton to write on this . But it’s always and always easier to start low on Alk around 7 or even lower and then slowly go up there upto 10-11 .
    That’s what I normally do . Creep up to 11 Alk over a course of 12 months starting from 7
     
  11. Nezw0001

    Nezw0001 I contributed!
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    I run 8 ish ie 8.3-8.5
     
  12. Fross

    Fross Senior Member
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    Do you all dose regularly to stay at those levels? I'm using Marin Pro and my alk naturally sits around 7.6. I dosed a bit up to 8.3 but it gradually starts falling again. I'm not sure I want to commit to doesing every day to stay at a particular number.
     
  13. csb123

    csb123 Senior Member
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    Automated dosing of kalkwasser and a Calcium reactor.
     
  14. RSnodgrass

    RSnodgrass TCMAS President
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    I'd be curious to bug you about how you work those two together.
     
  15. Mordim

    Mordim Just keep reefing
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    I run 9 dkh. I like where it keeps my ph at 8.2. But it's not so high that I get a bunch of build up on pumps.
     
  16. OP
    Nickz

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    Interesting, why start so low if your goal is 11?

    maybe I'll just hold at 10 for now( since it is currently 9.85) to see how it goes.
     
  17. csb123

    csb123 Senior Member
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    I have a timer on a used master flex pump to dose the kalkwasser at intervals throughout the day. My alk consumption exceeds what I can dose with kalkwasser in a given day. My calcium reactor is also on a masterflex and it doses continuously, which I adjust by the speed of the masterflex.
     
  18. DarkSky

    DarkSky Administrator
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    Alk stability is very important for SPS, if it fluctuates constantly you might see little to no growth or mortality. That low of alk and a 1dkh change probably won't be that big of an issue.

    I'm using a Neptune Dose in conjunction with a Trident to keep my alk fairly stable - my daily fluctuation is around 0.1 dKh at most. Currently dosing 125 ml of 2 part soda ash a day @ BRS' mixing recommendations.
     
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  19. abhishek

    abhishek Senior Member
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    Because every new tank I have started - it does always way better and I can keep acros from the very beginning when the alk is around 7 . Every time I have tried to go over 8.5 in new tanks, they tend to STN and take time to adjust.
    Over time , I always increase it as I have always had good growth with high Alk and high Calcium but its a slow process for me
     
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  20. Fishfoo

    Fishfoo I contributed!
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    What do you do with the frags you put in halfway through the process (when let's say the alk is now ~9-10 dkh)?
     

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