Results 1 to 7 of 7
  1. #1
    Supporting Member Reefahholic's Avatar
    Join Date
    Feb 2014
    Location
    77573
    Posts
    7,054
    Post Thanks / Like
    Post Thanks / Like

    Alright guys- Phosphate help- Any Math people here?

    Ok, so Iím having a huge brain fart this morning. Iím not sure why this is tweaking my brain so hard. Maybe itís because I test in PPB Parts Per Billion). You guys are all familiar with that. Then we convert to PPM.


    So hereís my question:

    My current PO4 level was 0.33

    I dosed and dropped it from 0.33 down to 0.22.

    Thatís a 0.11 drop.

    Now hereís where my brain fart comes in. I donít want to drop the level any more than .5 ppm right now.

    So is 0.33 - 0.22 = 0.11 more than the 0.5 drop?

    Is it a 1.1 drop or .1 drop?

    Does .1 x 5 = .5 and Iím safe. Or did I go way over the hill and drop it more than double?? 1.1??

    0.11 or 1.1?

    Gosh dang iím so confused this morning. Iíve called 3 reefers and everybody is confused.


    I had this all worked out a year ago. Not sure what happened. Iím getting old!!!!

  2. #2
    Supporting Member Reefahholic's Avatar
    Join Date
    Feb 2014
    Location
    77573
    Posts
    7,054
    Post Thanks / Like
    Post Thanks / Like
    I’m thinking I’m ok and just dropped by a 10th. Meaning I could drop 4 more 10th’s until I hit the 0.5 max.??

  3. #3
    Supporting Member Fish Keeper82's Avatar
    Join Date
    Jun 2015
    Location
    Beltway 8 and Fort Bend Toll Rd.
    Posts
    431
    Post Thanks / Like
    Post Thanks / Like
    I think your way over thinking it.

    Assuming all the numbers you posted are in ppm then, you dropped 0.11 ppm. You started at 0.33 ppm .... you can only drop 0.33 ppm then you are at zero..... it's not possible for you to drop 0.5 ppm (same as 0.50 ppm) since you only have 0.33 there to begin with.

    Just remember to write in that zero and it all make sense.
    -Josue

  4. Likes Reefahholic liked this post
  5. #4
    Supporting Member Reefahholic's Avatar
    Join Date
    Feb 2014
    Location
    77573
    Posts
    7,054
    Post Thanks / Like
    Post Thanks / Like
    Quote Originally Posted by Fish Keeper82 View Post
    I think your way over thinking it.

    Assuming all the numbers you posted are in ppm then, you dropped 0.11 ppm. You started at 0.33 ppm .... you can only drop 0.33 ppm then you are at zero..... it's not possible for you to drop 0.5 ppm (same as 0.50 ppm) since you only have 0.33 there to begin with.

    Just remember to write in that zero and it all make sense.
    OK, so I’m good then. Gosh I don’t know what I’m thinking this morning.

    Math is not my thing especially when you get into these tiny numbers (ppb and ppm).

    I just know that to convert ppb to ppm you...


    74 ppb x 3.066 = 226.884 / 1,000 = 0.22 ppm

    After that was when I got confused.

  6. #5
    Supporting Member Fish Keeper82's Avatar
    Join Date
    Jun 2015
    Location
    Beltway 8 and Fort Bend Toll Rd.
    Posts
    431
    Post Thanks / Like
    Post Thanks / Like
    I know what you mean so I stopped doing the math and now just use the chart where it already converted for you. One less step to mess up at.

    Hanna ULR Phosphorus Checker ppb to ppm phosphate conversion chart
    -Josue

  7. Likes Reefahholic liked this post
  8. #6
    Supporting Member Fish Keeper82's Avatar
    Join Date
    Jun 2015
    Location
    Beltway 8 and Fort Bend Toll Rd.
    Posts
    431
    Post Thanks / Like
    Post Thanks / Like
    Chart shows 74ppb to convert to .227 ppm. So you could round up to .23 or just drop the last digit and call it .22 . Remember that .22 and .220 is the same number.
    -Josue

  9. Likes Reefahholic liked this post
  10. #7
    Supporting Member Reefahholic's Avatar
    Join Date
    Feb 2014
    Location
    77573
    Posts
    7,054
    Post Thanks / Like
    Post Thanks / Like
    Quote Originally Posted by Fish Keeper82 View Post
    Chart shows 74ppb to convert to .227 ppm. So you could round up to .23 or just drop the last digit and call it .22 . Remember that .22 and .220 is the same number.
    Thx! Makes it a lot easier.


Similar Threads

  1. Math Geek
    By in forum The Lounge
    Replies: 2
    Last Post: 06-10-2008, 07:30 PM
  2. Canadians are alright with me... Seriously.
    By Scott in forum The Lounge
    Replies: 26
    Last Post: 05-05-2008, 10:46 AM
  3. Math is hard.. Voltage to Moonlight?
    By Ulric in forum Do-it-Yourself
    Replies: 11
    Last Post: 07-15-2005, 09:54 PM
  4. Help: Will my anemone be alright?
    By in forum Marine and Reef General Discussion
    Replies: 3
    Last Post: 01-25-2005, 01:16 PM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •