Dosing help needed

[terri_ann]

I just never can remember how to calculate all this stuff...ugh! Can someone walk me through it step by step so I can refer back to it when needed? Math has always been one of my struggles and since my brain surgery, it is worse...

Starting at 8.0 dKH over 3 days/72hrs the alkalinity dropped to 6.7 dKH. 1.3dKH consumption over 3 days/72hrs. I use the BRS 1.1ml doser. Now what do I do?

 

[aeras1131]

Can I get you an answer in the morning? I worked like 12 hours

 

[terri_ann]

Yes, thank you!!

 

[Randy Holmes-Farley Verified Community Expert]

Such calculations cannot exactly get you to an answer because alk consumption depends on the actual alk, and is faster at 8 dKH than at 7 dKH.

But in general, use any of several calculators to determine how much liquid is needed to dose 1.3 dKH over 3 days = 0.4 dKH per day.

Then divide that by 1.1 mL and set the dosed for that number of minutes. Note that it may deliver more or less than that rated number and may need to be adjusted for that reason too. [emoji3]

 

[lilbitreefer]

Here's what I did.
Best way I did it was measure current alkalinity then use the BRS calculator to the correct dose. Make sure to follow the directions and not raise the dKh more than what they recomend. Do this daily until you get your target dkh. I think it will be better to manually add the alk for the first few days if not they you will be spending more time programing a timer than just manually adding it. Or you could do what Randy was saying to add over three days.

quick calculation example for the pump.

When dosing 50mL a day:

50mL/1.1mL= 45.45 this means to run your timer for 45 minutes.

the exact math so you can see everything
50mL/(1.1mL/1min)
this breaks down to
(50mL/1.1mL)*1 min

mL cancel out to leave minutes

 

[terri_ann]

Such calculations cannot exactly get you to an answer because alk consumption depends on the actual alk, and is faster at 8 dKH than at 7 dKH.

But in general, use any of several calculators to determine how much liquid is needed to dose 1.3 dKH over 3 days = 0.4 dKH per day.

Then divide that by 1.1 mL and set the dosed for that number of minutes. Note that it may deliver more or less than that rated number and may need to be adjusted for that reason too. [emoji3]

Thanks hon! You know I've been doing this for years and still have problems. Getting too old but thank God for you, my son, and others who can think better than me. I did get a little over 0.4dKH per day thanks to the http://reef.diesyst.com/chemcalc/chemcalc.html calculator. Now to get the code for apex figured out. It's such a small dose but I won't remember consistently to dose daily so the doser is best for me to use.

 

[terri_ann]

Here's what I did.
Best way I did it was measure current alkalinity then use the BRS calculator to the correct dose. Make sure to follow the directions and not raise the dKh more than what they recomend. Do this daily until you get your target dkh. I think it will be better to manually add the alk for the first few days if not they you will be spending more time programing a timer than just manually adding it. Or you could do what Randy was saying to add over three days.

quick calculation example for the pump.

When dosing 50mL a day:

50mL/1.1mL= 45.45 this means to run your timer for 45 minutes.

the exact math so you can see everything
50mL/(1.1mL/1min)
this breaks down to
(50mL/1.1mL)*1 min

mL cancel out to leave minutes

Thank you!!!! I agree to dose it manually is the best at first as you said! I would hate to figure out how much time I have spent programming the Apex...it's been a lot over the years! Ugh Showing me the exact math really helps! Thank you again!!!!

 

[lilbitreefer]

You have the apex DOS? I think there is an idiots set up on there. So you dont have to do the programing portion.

 

[terri_ann]

You have the apex DOS? I think there is an idiots set up on there. So you dont have to do the programing portion.

No, I don't have their Dos.[emoji21]

 

[terri_ann]

Such calculations cannot exactly get you to an answer because alk consumption depends on the actual alk, and is faster at 8 dKH than at 7 dKH.

But in general, use any of several calculators to determine how much liquid is needed to dose 1.3 dKH over 3 days = 0.4 dKH per day.

Then divide that by 1.1 mL and set the dosed for that number of minutes. Note that it may deliver more or less than that rated number and may need to be adjusted for that reason too. [emoji3]

So .4÷1.1= .36? Or 1.1÷.4= 2.75? Run 36 seconds or 2.75 minutes? Then is that for running just once a day, 12 times or 24 times? I know I seem like an idiot but math makes me one....ugh![emoji852]

 

[Daltrey]

BRS has a calculator.

https://www.bulkreefsupply.com/reef-calculator

 

[Randy Holmes-Farley Verified Community Expert]

So .4÷1.1= .36? Or 1.1÷.4= 2.75? Run 36 seconds or 2.75 minutes? Then is that for running just once a day, 12 times or 24 times? I know I seem like an idiot but math makes me one....ugh![emoji852]

Sorry, we need to back up.

We need to use a calculator to determine how much liquid volume your tank needs for the 0.4 dKH boost.

The one above is fine if you use the BRS product. Use the alkalinity calculator.

Then take that volume in mL and divide by how fast the doser adds it (1.1 ml/min) to get a time of dosing in minutes..

 

[terri_ann]

Sorry, we need to back up.

We need to use a calculator to determine how much liquid volume your tank needs for the 0.4 dKH boost.

The one above is fine if you use the BRS product. Use the alkalinity calculator.

Then take that volume in mL and divide by how fast the doser adds it (1.1 ml/min) to get a time of dosing in minutes..

Thanks dear. I don't use the BRS 2 part. I will see if I can follow it. Thanks for the "back up"[emoji16]