Soon 5 years old Triton methode tank

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Sincerely Lasse
He knows he is the bomb!
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Lasse

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Yesterday - I did a very interesting experiment. Since before I know that KH can vary during day and with help of this - you can estimate the growth of the calcium carbonate of the stony corals and - in my case - clams. The normal point of view is that this happens during the light period - or at least most of it.

At 12:00 last day - I switch of my dosing of the alkalinity part of my Core 7. (3a+b) and switch it on att 00:00 this day (red marking) During this time - my kh was lowered by 0.7 units. Measurements done with a KH director.

My optimal photosynthesis was between 14:00 - 21:00 (high pH -> low CO2 content -> High consumption of CO2 - high photosynthesis). Between 21:00 - photosynthesis decrease rather much - but the consumption of alkalinity was high all the way to around 23:00

How to calculate the calcification during this 12 hours. Easy - we recalculate the loss of dKH (0.7 units) into CaCO3 (limestone) through division of the delta KH - 0.7 dKH - with 0.056 and we will get a decrease with 12,7 mg/L of CaCO3. My tank is 300 L - it means that my amount of limestone (produced by coraline, corals, clams and other producers of limestone) have raised with around 3.7 gram during this time. This night - I will shout down the dosing between 00:00 and 12:00 instead and do the same calculations for my "night period"

Blue - dosing as normal

1644241058046.png


Sincerely Lasse
 

Tristren

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Yesterday - I did a very interesting experiment. Since before I know that KH can vary during day and with help of this - you can estimate the growth of the calcium carbonate of the stony corals and - in my case - clams. The normal point of view is that this happens during the light period - or at least most of it.

At 12:00 last day - I switch of my dosing of the alkalinity part of my Core 7. (3a+b) and switch it on att 00:00 this day (red marking) During this time - my kh was lowered by 0.7 units. Measurements done with a KH director.

My optimal photosynthesis was between 14:00 - 21:00 (high pH -> low CO2 content -> High consumption of CO2 - high photosynthesis). Between 21:00 - photosynthesis decrease rather much - but the consumption of alkalinity was high all the way to around 23:00

How to calculate the calcification during this 12 hours. Easy - we recalculate the loss of dKH (0.7 units) into CaCO3 (limestone) through division of the delta KH - 0.7 dKH - with 0.056 and we will get a decrease with 12,7 mg/L of CaCO3. My tank is 300 L - it means that my amount of limestone (produced by coraline, corals, clams and other producers of limestone) have raised with around 3.7 gram during this time. This night - I will shout down the dosing between 00:00 and 12:00 instead and do the same calculations for my "night period"

Blue - dosing as normal

1644241058046.png


Sincerely Lasse
Thanks for that. It will be interesting to see the night shift numbers as well.
 

Lasse

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Here they come - graphs will follow

After analyse of my alk consumption between 00:00 and 12:00 today - I can see that my system "dark" consumption is around 0.2 dKH. It means a CaCO3 production of 3.6 mg/L -> 300 * 0,0036 = 1.08 g. In post #246 I found that during 12:00 to 00:00 the tank production was around 3,7 g CaCO3. This give me a 24 hour production of around 4.8 g CaCO3 - 22.5 % during the 12 "dark" hours (00:00 - 12:00) and 77.5 % during the hours with real photosynthesis

Sincerely Lasse
 

Lasse

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A graph. Red no adding od Core7 3a+b. Black adding Core7:3a+b. Note that half the consumption of alakality (hence production of CaCO3) during "day" time happens after max photosynthesis. I maybe use these tests to make two different dosing schedules - one between 12 - 00 and one between 00 - 12 in order to keep the KH stable

1644336339299.png



Sincerely Lasse
 

Tristren

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A graph. Red no adding od Core7 3a+b. Black adding Core7:3a+b. Note that half the consumption of alakality (hence production of CaCO3) during "day" time happens after max photosynthesis. I maybe use these tests to make two different dosing schedules - one between 12 - 00 and one between 00 - 12 in order to keep the KH stable

View attachment 57322


Sincerely Lasse
Interesting again, thanks.
Is there any negative impact from having the KH drift up a bit at night though?
 

Lasse

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This summer - I only run Core7:3 a+b during night time. I ended up with KH fluctuation near 2 units. Nema problema. But a stable is probably to prefer. I did this investigation because I want to make its steady - I have change my dosing now 78 % during 12 - 00 and 22 % between 00 - 12

Sincerely Lasse
 
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