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Old 10/01/2016, 12:08 AM   #551
Martin Kuhn
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Dosing Ca /Alk in a fix ratio for each and every tank in my eyes is nothing but nonsense

There are Several reasons why one tank "consumes" more Ca, the next one more Alk

If you dose in a fix ratio, you will end up in a scenario where one of the two values are not ok. This is reality and you will find tons of messages alone in this forum.

I think the failure in thinking is that people suggesting this try to "add something that is close to seawater"
But
We'd better "add the correct amounts" so that our "tanks water will become like natural seawater"
That's a big difference !

In reality whatever amounts of Ca/Alk (and also Mg and other Elements) corals are consuming, this is nothing because there is so much water around and flowing with perfect and stable parameters

Totally different in our tanks, especially if stuffed with SPS. What this guys consume in order to grow as we want them to, we might need to add huge amounts of Ca/Alk steadily.
Supplementing this is kind of feeding SPS. Not doing this is letting corals suffer.
Adding it in a fixed ratio of Ca/Alk if one of the values is in a "not ok range" is also letting them suffer.

The same is for other traces (K, iodine, Stro). Different to Ca/Alk and Mg WE can't measure ..... so can't control dosing of this elements (yet).
And this is the miracle of waterchanges because they add and or correct these elements.
Ver good in my eyes also: Ca / Alk / Mg recipes that bring traces with the dosing.






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Old 10/01/2016, 01:01 AM   #552
Martin Kuhn
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Dosing Ca /Alk in a fix ratio for each and every tank in my eyes is nothing but nonsense

There are Several reasons why one tank "consumes" more Ca, the next one more Alk

If you dose in a fix ratio, you will end up in a scenario where one of the two values are not ok. This is reality and you will find tons of messages alone in this forum.

I think the failure in thinking is that people suggesting this try to "add something that is close to seawater"
But
We'd better "add the correct amounts" so that our "tanks water will become like natural seawater"
That's a big difference !

In reality whatever amounts of Ca/Alk (and also Mg and other Elements) corals are consuming, this is nothing because there is so much water around and flowing with perfect and stable parameters

Totally different in our tanks, especially if stuffed with SPS. What this guys consume in order to grow as we want them to, we might need to add huge amounts of Ca/Alk steadily.
Supplementing this is kind of feeding SPS. Not doing this is letting corals suffer.
Adding it in a fixed ratio of Ca/Alk if one of the values is in a "not ok range" is also letting them suffer.

The same is for other traces (K, iodine, Stro). Different to Ca/Alk and Mg WE can't measure ..... so can't control dosing of this elements (yet).
And this is the miracle of waterchanges because they add and or correct these elements.
Ver good in my eyes also: Ca / Alk / Mg recipes that bring traces with the dosing.






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Old 10/01/2016, 01:55 PM   #553
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Quote:
There are Several reasons why one tank "consumes" more Ca, the next one more Alk
Yes, this is especially true when systems have strong algal/macro filters because these try to get carbon from dissolved CO2 in the water. When CO2 can't dissolve into the water fast enough, alk starts being consumed in order to get carbon from it.

The worse case for this is an enclosed algae/chaeto reactor that has no contact with air; it has no choice but to consume alk.


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Old 10/26/2016, 12:23 AM   #554
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Month later and I got my ALK in order. Holding steady at 8.6-8.9 for 3 weeks almost. But I can't get my mag up, it's now up to 1100 but 10 days ago it was almost 1200. I out new media in my calcium reactor as well as remag to help boost it. However, I am not sure I out enough in.
Any thoughts on what could consume mag this much? Should I use mag flake to raise it quicker then use the remag in the calcium reactor to help hold it steady?

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Old 10/26/2016, 10:11 AM   #555
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Any water changes? Mg gets consumer pretty slowly, but a 100 point drop could be seen when trying to get the tank balanced. I would raise the Mg to where you want it to be, then try and see if your method is keeping it steady.


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Old 10/26/2016, 12:48 PM   #556
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Yeah I'm doing water changes every 3 weeks now (new concept as opposed to 4-5). I'm new in the SPS world and needed less in the LPS. I'm adding mag flake to my water change now to help raise it. Then will see if my calcium reactor can maintain it.

Corey


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Old 10/26/2016, 12:53 PM   #557
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I bet your Mg is low in the salt you are using for your water changes. The best thing to do is setup to do a water change and measure the Mg, Ca and alk of the new freshly mixed water. Most times you will have to adjust the mix to meet what you are trying to maintain in your tank. Once you start doing that you should see less swings in your parameters.


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Old 10/26/2016, 04:36 PM   #558
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I use IO. There is a spreadsheet floating around here with their numbers on it. I'll dig that up.

Corey


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Old 10/26/2016, 10:49 PM   #559
SantaMonica
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Even with no water changes, I used to never consume much mag. Got tired of testing unchanging numbers. Just seemed to stay up, except every year or so it would suddenly be low when I remembered to test again.


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Old 11/16/2016, 07:16 PM   #560
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I keep my alk between 8-9 dkh, Ca right around 450 and MG 1350 and i have been getting great results with these numbers on my display. I only use ME CORAL Alk, Cal, and there MAG.. It;s a local company out of Fort Lauderdale, FL. Great products..

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Old 11/21/2016, 04:46 PM   #561
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Got my mag up to about 1200. Calcium is about 500, and alk is holding around 8.3.
Good start?

Corey


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Old 11/22/2016, 10:53 AM   #562
Scorpius
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Quote:
Originally Posted by biecacka View Post
Got my mag up to about 1200. Calcium is about 500, and alk is holding around 8.3.
Good start?

Corey
Better. When I first had my tank setup 500 Calcium was not uncommon. I like to keep my magnesium around 1400.

Here's a nifty chart for Ca/Alk ratio so you have an idea of how in balance things are.

DKH Ca
4.50 393
4.75 395
5.00 397
5.25 398
5.50 400
5.75 402
6.00 404
6.25 405
6.50 407
6.75 409
7.00 411
7.25 413
7.50 414
8.00 418
8.25 420
8.50 422
8.75 423
9.00 425
9.25 427
9.50 429
9.75 431
10.00 432
10.20 434
10.50 436
10.75 438
11.00 439


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Old 07/02/2017, 09:39 PM   #563
Zhuisken
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Alkalinity: 10
Calcium: 500
Magnesium: 1500

Dana Riddle had a interesting talk at MACNA last year on high alkalinity levels and increased photosynthesis in corals. He has a lot of good research on corals growth and coloration.

Good water chemistry, lighting, and flow can make for some great looking corals!

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Old 07/03/2017, 10:29 AM   #564
JB NY
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Originally Posted by Zhuisken View Post
Alkalinity: 10
Calcium: 500
Magnesium: 1500

Dana Riddle had a interesting talk at MACNA last year on high alkalinity levels and increased photosynthesis in corals. He has a lot of good research on corals growth and coloration.

Good water chemistry, lighting, and flow can make for some great looking corals!

Sent from my SM-G935V using Tapatalk
Dana uses pocillopora a lot in his studies. Those things grow like weeds in the worst of circumstances so I am not surprised that they might do good with high alk. I've never found low or high alk to have much impact on growth. Better to keep ca around 450 and Mg 1350-1450.


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Current Tank Info: 270G SPS Tank, 140G sumps, 35G Frag Tank, Ultra Reef Akula UKS-200 Skimmer, Apex, Giesemann Spectra 3x250W MH 4x80W T5, 2xReefbrite Tech 72" Blue LED, Triton Dosing, ARID C30 Algae Reactor, Maxspect Gyre
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Old 07/03/2017, 12:17 PM   #565
Zhuisken
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Dana uses pocillopora a lot in his studies. Those things grow like weeds in the worst of circumstances so I am not surprised that they might do good with high alk. I've never found low or high alk to have much impact on growth. Better to keep ca around 450 and Mg 1350-1450.
Consistency I believe is the key when your parameters is within a reasonable range. Alk, Ca, Mg.

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Old 09/25/2017, 02:14 PM   #566
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Arggg, I need to read this entire thread again!


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Old 10/25/2017, 01:06 PM   #567
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My Alk has been 12 or higher for the last 6 months. Hasnt had any noticiable benefit so I am going to drop it back down. Have tried as high as 14.

On the other hand, it didnt cause any trouble except on one SPS that i bought from the LFS which they kept at 7.5 Alk and it went through a rough adjustment. Its doing fine now too.

Im going to let it gradually fall back to 9 over the next couple months.


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