I dose Kalk into my 40 gallon aquarium using my auto top off. I put 1/2 tsp per gallon of RODI water. I use this and 6 gallon water changes weekly to keep my tank stable. My Calcium is 505 and my Alk is 6. Now I don't test often, maybe once a month or every other month but whenever I test these are my results. So I tested today and it was the same again, now should I just keep these parameters meaning my Alk or should I try and raise it by adding more Kalk
Does Dosing Kalk Raise Your Alk as well as Calcium?
- Thread starter JVS
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Velcro
2500 Club Member
It's usually much easier to make adjustments with two part vs. changing kalk amount. I would probably just stop kalk for a little while to let calcium fall on its own, then slowly raise alk with daily alkalinity solution (made from a 2 part product).
What is your Magnesium at? If it's about 3x your Calcium (1515) you could just bump your Alkalinity up using baking soda, although those numbers are pretty high. The first link below goes over the parameters recommended for a reef tank and the second one is just a calculator in case you need to make some changes. FWIW I use kalkwasser in my ATO too and whenever I need to make some changes I start with Magnesium first, then Calcium and then Alkalinity. If everything is in order the kalkwasser at the proper dosage should keep these numbers fairly stable for quite awhile.
http://www.reefkeeping.com/issues/2004-05/rhf/index.htm
http://reef.diesyst.com/chemcalc/chemcalc.html
http://www.reefkeeping.com/issues/2004-05/rhf/index.htm
http://reef.diesyst.com/chemcalc/chemcalc.html
Last edited:
chipmunkofdoom2
Always Making Something
Good advice from Cloak. Calcium hydroxide (kalk or kalkwasser) does raise calcium as well as carbonate alkalinity. Personally, I would not dose calcium hydroxide unless your tank needs calcium and carbonate.
To raise alkalinity alone, you could dose something like Randy Holmes-Farley's DIY alkalinity supplement. Simply dissolve a few cups of baking soda in a gallon of water.
Keep in mind, though, you will need to test more frequently as you're dialing in the correct dose to raise your carbonate alkalinity to the desired levels.
To raise alkalinity alone, you could dose something like Randy Holmes-Farley's DIY alkalinity supplement. Simply dissolve a few cups of baking soda in a gallon of water.
Keep in mind, though, you will need to test more frequently as you're dialing in the correct dose to raise your carbonate alkalinity to the desired levels.
In relation to your Calcium 1460 is fine right now IMO, but I would use that calculator in the link posted above and punch in your tank size, the product (baking soda) and your desired Alkalinity level and give it a shot. See how long the numbers hold for until you need to make some changes again. FWIW I'm going to go check my parameters here in the next hour or so and probably do the same thing. I'll post the results if your interested.
Btw how do your corals look? If all is well you might not want to fiddle with the chemistry of your tank too much and just stick with your current routine.
Btw how do your corals look? If all is well you might not want to fiddle with the chemistry of your tank too much and just stick with your current routine.
I'm new to everything but learning so much everyday and appreciate everyone and the help they bring. Today my testing was:
Alk - 7.3 dKH
Ca - 465
Mg - 1260
I want to work my way up to an 8.3 Alk (and also work my SP down from 1.027 to 1.026) and felt my Mg and Ca was in decent ranges so I took the Baking Soda route..I used the reef chemistry conversion page. For my 55 g tank I generally assumed 45 g of water. I did a ro/di gallon to top off with 1/2 teaspoon of baking soda mixed in real well. The calculator called for 1 teaspoon so I cut it in half to slowly raise the Alk and to not create a big swing in PH..I am only holding two soft corals right now and just trying to work out the basics.
What does everyone think of my newbie thought process?
Alk - 7.3 dKH
Ca - 465
Mg - 1260
I want to work my way up to an 8.3 Alk (and also work my SP down from 1.027 to 1.026) and felt my Mg and Ca was in decent ranges so I took the Baking Soda route..I used the reef chemistry conversion page. For my 55 g tank I generally assumed 45 g of water. I did a ro/di gallon to top off with 1/2 teaspoon of baking soda mixed in real well. The calculator called for 1 teaspoon so I cut it in half to slowly raise the Alk and to not create a big swing in PH..I am only holding two soft corals right now and just trying to work out the basics.
What does everyone think of my newbie thought process?
bobnicaragua
Well-Known Member
If you want an easier route, a series of water changes with a high alk salt would do the trick.
Reef Crystals usually has an alkalinity of around 11. Two or three 5 gal water changes and should be good to go.
Reef Crystals usually has an alkalinity of around 11. Two or three 5 gal water changes and should be good to go.
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