MiddletonMark
Premium Member
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Low nutrient tanks what do you run your Alk
- Thread starter clkwrk
- Start date
orientalexpress
New member
i run reactor and kalwasser.should i turn off both to bring alk down?are there any other way to bring my akl down?thanks
lapsan
lapsan
ctxmonitor
New member
i was also trying to raise my alk to 8-9. But i guess I will let it stay where it is now.
alk 7.6
pH 8 - 7.8
mag 1260
cal 400
alk 7.6
pH 8 - 7.8
mag 1260
cal 400
shelburn61
New member
A lot of folks have backed off high alk due to the STN concerns. Studies have shown higher than NSW alk to speed calcification though so has anyone actually seen faster growth with the higher alk levels in their tank?
dymaxiun
New member
I have been running my Alk at a 8.5 highest is 9, and have seen nothing wrong. I always considered increasing this, but didn't see a need to.
I think its a general rule that whatever level you decide to run it should be consistantly at that regardless of stocking levels, or livestock.
I think its a general rule that whatever level you decide to run it should be consistantly at that regardless of stocking levels, or livestock.
jsweir
New member
I run kalk 24/7 and dose CaCl. My alk runs at 10 - 12. I havn't noticed any STN that wasn't caused by a flow problem. I have lost a few corals, but I think that was moving them too much rather than alk. I try to lower the alk with no luck. Turning my reactor off just means it jumps back when I turn it back on...
shelburn61
New member
Not a study, but this will give jist of it.
http://www.advancedaquarist.com/issues/apr2002/chem.htm
http://www.advancedaquarist.com/issues/apr2002/chem.htm
clkwrk
Active member
Okay but I hope we aren't comparing all sps to porites .
"Unlike the calcium concentration, it is widely believed that certain organisms calcify faster at higher alkalinity than in normal seawater. This result has also been demonstrated in the literature, where it has been shown that adding bicarbonate to seawater increases the rate of calcification in Porites porites17 Figure 6). In that case, a doubling of the bicarbonate concentration resulted in a doubling of the calcification rate.
"
"Unlike the calcium concentration, it is widely believed that certain organisms calcify faster at higher alkalinity than in normal seawater. This result has also been demonstrated in the literature, where it has been shown that adding bicarbonate to seawater increases the rate of calcification in Porites porites17 Figure 6). In that case, a doubling of the bicarbonate concentration resulted in a doubling of the calcification rate.
"
merlock116
New member
anything less than 10 dkh my coralline stops growing. perhaps i need it higher than normal because I use IO and have low magnesium levels. i just got some mag flake and will be bumping up th levels and monitoring the results.
i keep mine around 11. never had any stn issues.
i keep mine around 11. never had any stn issues.
dustin Combs
In Memoriam
My dkh runs from 7.5-8. I use a 50/50 IO/Oceanic mix. I continues to lose corals due to stn with higher levels. I noticed the darkened corals becoming lighter and coloring up with the reduction or lowering of dkh. My levels of Ca are steady at 400 and have been form a few months. I have notices an explosion of coraline in my display also.
panic
Premium Member
I have noted a number of changes in these levels since I have changed salt. I went from IO only, to 40 IO / 40 TM / 20 Oceanic. dkh went from 10-12 to 7-8, Ca went from 390 to 450, and my ph went from 8.3 to 8.18. I have noticed darker color saturation especially in lower level sps (28" from light) and slower coralline growth. However, I have some bleaching in upper level corals (12" from light).
shelburn61
New member
Seems like the mechanics of the chemical process don't differ that much based on genus?
"...most scientists agree on about how calcification takes place (whether it has been experimentally proven or not). The details can be different for different organisms, so the focus will be on corals, but calcifying algae are similar in many respects.1 In the case of corals, calcification takes place external to the organism. If one thinks of corals as tissue coating a calcium carbonate skeleton, then calcification takes place underneath the lowest layer of tissue (the calicoblastic epithelium, also called the basel epithelium) in a very thin water space called the extracytoplasmic calcifying fluid2 "
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