Dosing advice?

OneFish

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Hello all,

I have a 22 gallon mixed reef more on the SPS dominant side and with the plans of getting a lot more SPS. I use Red Sea coral pro salt and do a weekly 4 gallon water change. I also use reef-roids a couple of times a week. I have two Kessil a160we's running for 11 hours, hitting a max of 30% color and 65% intensity for 3 hours. I used to dose a B-Ionic 2 part but stopped about a year ago when I realized my corals weren't large enough to use a noticeable amount nutrients and I was overdosing it.

I do not test often, bad, I know, but I do keep up on weekly water changes with the nutrient/element heavy coral pro salt and only have 2 clowns allowing me to strictly watch how much I feed them so I have always thought my parameters would just be fine. Recently, I have noticed that some of my zoas have been closing up (even though most of my colonies are perfectly fine). I also have had a few SPS in my tank that have not grown upwards in the last 6 months even though they have been continuously encrusting. And, honestly, a few of them could probably use some coloring up - I have thought about using Red Sea's trace elements kit to see how that works.

Yesterday, one day after a water change, I tested and these were my results using the Red Sea foundations pro kit:

Ca - 410 ppm
Mg - 1420 ppm
Alk - 5.3 dKH

Obviously alk. is very low, so my question is - How would you go about raising it? I still have the B-Ionic and I added 6 ml of both part 1 and 2 yesterday. I have to test today, but what is the max can I raise it per day until I get between 7-9 dKH? And how would you spread that out throughout the day?

Once I hit the ideal parameters, I will figure out how much my tank needs everyday and start dosing accordingly. I just need to get to the parameters first!

Dosing 9.6 ml of part 1 will raise my tank by 1 dKH.
Dosing 12.5 ml of part 2 will raise my tank by 10 ppm.

9.jpg
 
Can you double check your alk? that seems unusually low especially with calcium being over 400. I'd expect calcium to be low as well. Your corals look to good to have alk be that low. Beautiful tank by the way! :)
 
I've read you shouldn't increase Alk by more that 1 meq/l per day to be on the safe side. That equal around 2.5 dKH. I've dealt with low alk for a long time and I've always stuck to this and haven't had any problem. Keep in mind, I use this as a "most in a day" and changes this quick might stress your corals.
 
Can you double check your alk? that seems unusually low especially with calcium being over 400. I'd expect calcium to be low as well. Your corals look to good to have alk be that low. Beautiful tank by the way! :)
I just retested alkalinity and got very similar results, I am not super great and telling when it is actually green versus blue-green, but it definitely went yellow shortly after the 5.3 dKH mark. I am going to test calcium again quick and will update to make sure that was accurate.
 
Can you double check your alk? that seems unusually low especially with calcium being over 400. I'd expect calcium to be low as well. Your corals look to good to have alk be that low. Beautiful tank by the way! :)
Calcium was at 410 again... and thanks for the compliment!!
 
I've got the same situation. Calcium and alk are used in some sort of ratio but I always go through more alkalinity additive. I tried to figure out why, well, not really. I don't care that much but it does mean that I have to dose 2x more Alk than Calcium.
 
I just re-calibritated my refractometer and my tank is at 1.024. Going to start topping the tank off with 1.025 salinity mix until it gets back to 1.025-1.026, then I will retest alkalinity before dosing anymore.
 
You might have low alk but the tank looks great. Whatever you do, do it slowly. The corals look like they don't mind too much. Of course low Alk can take a while to present problems but don't cause any headaches by trying to raise things to fast. I'd also encourage you to test the Alk in your fresh saltwater. I had a batch of brand new, freshly mixed saltwater that measured 5.4 dKH.
 
An ALK of 5.4 is pretty low. It sounds like you are doing the test right. Figuring out exactly when the hue is just right can be a bit frustrating.

You may try a different test like Salifert for ALK. From what I have heard Salifert always runs a bit higher than other brands.

Or you could just get the Hanna ALK test which returns a numeric value and takes away the frustration of color matching.

You might try taking a sample of water to your LFS to test.

There are ways to raise ALK. I use the BRS two part. For ALK, it is just Soda Ash dissolved in RODI. BRS has a dosing calculator on their web site. You plug in your system volume, your ALK and your target ALK and it will tell you how much to dose.
 

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