BRS 2 part dosing

Shinte122305 · May 24, 2019

I'm stumped. Im using brs 1.1ml doser for 2 part dosing. i used their calculator to get the right amount i have a total of 87 gallons i put 80 gallons in the calculator. my alk wa sat 8.5 and i wanted to raise it to 9.0.

The calculator calls for 28.5 ml to raise from 8.5 to 9.0 so for a 1.1ml doser thats 25 minutes. so thats what i did yesterday and today my alk is at 9.8..................

I use hanna checker for alk i opened a new one last week.
im using the new pharma products i bought the starter pack that comes with the packages to mix in the provided 1 gallon jugs. i mixed them and waited until the next day to use them all three jugs mag calcium alk where crystal clear.

How can the brs calculator be sooooOOOOOO off or what did i do wrong

Hitman · May 24, 2019

They are approximately 1.1 ml per minute, the one I had was closer to 2 ml a minute. Get a graduated cylinder and run it for 10 minutes. What ever number it fills to in the 10 minutes just divide by 10 and that’s what it doses. For example if at 10 minutes it stops at 16 ml divided by 10 is 1.6 ml per minute.

Shinte122305 · May 24, 2019

Doing that right now, ill let you know in 15

aarbutina · May 24, 2019

Hitman said:
They are approximately 1.1 ml per minute, the one I had was closer to 2 ml a minute. Get a graduated cylinder and run it for 10 minutes. What ever number it fills to in the 10 minutes just divide by 10 and that’s what it doses. For example if at 10 minutes it stops at 16 ml divided by 10 is 1.6 ml per minute.

This. Mine runs at 2.1 ml per minute (actually both of mine do). I think it’s actually very common for these to run at about 2 ml/min.

Shinte122305 · May 24, 2019

well its running right now. let see what it is after 10 minutes..... if its 2 ml per minute i doubled the dosage which would get it to 9.8 ish........... -_-

Hitman · May 24, 2019

Shinte122305 said:
well its running right now. let see what it is after 10 minutes..... if its 2 ml per minute i doubled the dosage which would get it to 9.8 ish........... -_-

Well times up!!! Lol

Shinte122305 · May 24, 2019

well....problem solved the freaking things both run at 2.1 ml per minute..................................

Shinte122305 · May 24, 2019

I dosed literally double what i was suppose to. Someone really needs to tell them thank god i didnt do this on my Frag tank

Hitman · May 24, 2019

It’s a common issue and that’s why they cover their buts by saying approximately 1.1ml per minute.

Hitman · May 24, 2019

Always remember no matter the brand double check everything that doses or poops anything in your tank it will save you a ton of headaches. Over my 25 years I have made a ton of mistakes and many are ones that I surely new better but still did it anyway. It happens that god you are one that checks your levels properly and caught the issue as many don’t until it’s to late.

Shinte122305 · May 24, 2019

Hitman said:
Always remember no matter the brand double check everything that doses or poops anything in your tank it will save you a ton of headaches. Over my 25 years I have made a ton of mistakes and many are ones that I surely new better but still did it anyway. It happens that god you are one that checks your levels properly and caught the issue as many don’t until it’s to late.

seriously if id have left it for 3 days like everyone says my corals would have been toasted. alk at 13 or something crazy

Shinte122305 · May 24, 2019

Anyways case closed!!! thank you for the help! i fixed the apex programming for the new and correct flow rate -_-. Now ima just wait until the levels drop back to the 8.8 alk range before i turn the pumps back on.

Hitman · May 24, 2019

Shinte122305 said:
Anyways case closed!!! thank you for the help! i fixed the apex programming for the new and correct flow rate -_-. Now ima just wait until the levels drop back to the 8.8 alk range before i turn the pumps back on.

That’s why we are all here! Help others from making the same mistakes we have. Happy reefing!!

Larry L · May 24, 2019

Shinte122305 said:
today my alk is at 9.8 ... I use hanna checker for alk

It does sound like your doser was running faster than expected, but also, the accuracy of the Hanna alk checker (assuming you have the HI-772) is ±0.3 dKH ±5% of reading - so if you get a reading of 9.8, the actual alk could be as low as 9.0 (or as high as 10.6). See the calculator at: http://larryl.emailplus.org/fish/test-kit-calculators.html

Shinte122305 · May 25, 2019

Larry L said:
It does sound like your doser was running faster than expected, but also, the accuracy of the Hanna alk checker (assuming you have the HI-772) is ±0.3 dKH ±5% of reading - so if you get a reading of 9.8, the actual alk could be as low as 9.0 (or as high as 10.6). See the calculator at: http://larryl.emailplus.org/fish/test-kit-calculators.html

Yeah i have the 772 reagent and no its not that inaccurate, roughly 0.3 up or down which is really good. you dont need to know what alk is at EXACTLY. You just need consistency. if you always measure at 9.0 thats where you need to be regardless if its 9.3 9.4 8.7 8.6

Larry L · May 25, 2019

Shinte122305 said:
Yeah i have the 772 reagent and no its not that inaccurate, roughly 0.3 up or down which is really good.

When you say 0.3 up or down, I think you're talking about repeatability of the readings, which I agree is pretty consistent to what I see when I take multiple readings using the same water sample. But it's the manufacturer accuracy specs that tell you how close that reading is to reality, which is +/- 0.8 when you're in that range of the scale.