Adding Fuel to the Nitrate Debate: Why Water Changes DONT Reduce Nitrates
- Thread starter JardiniBoy
- Start date
Can't we all just get along? How about just making a drip system as mentioned in here earlier that you adjust to do a 100% water change every day? What do you equations tell you then? Just some food for thought. It's not all at one time so there will be a little time however little it is for nitrate to build up, but it is a constant water change and the volume eqauls 100% of the water in your tank every day! (just wanted to hear some more mathmatical babble!)
100% a day isnt necessary. I only drip ~30 gallons a day on a 265 and it keeps everything at very acceptable levels.
Okay kids..
Lets look at the math.....
After 20 weeks...
once again, you rock dude! Those of us who saw the asymptote feared the differential equation. That is one course that made my stomach turn...and now I have to take a refresher course in it (shudder).
Here is a mind teaser that I came up with in Calculus class one day (boring professor):
You are at your favorite bar and your bartender pours a glass of beer to the top (one full glass). She then takes another glass and fills it with half of the volume that she just poured (half of a glass). She continues pouring into the same glass half of the previous volume (quarter of a glass). She continues this until the end of time. How many glasses of beer will she have poured, including the original, when time (eternity) runs out?
This is similar to the frog jumping on the log...he will never get to the end. This one is just backwards.
Here is a cheater hint borrowed from Calculus class...if you don't know the answer, the answer is always two...except when it is four...that one always messed me up.
z/n waterchange every <Time Period> = n/z * <Time Period> waste max
assume 1/43200 ths change per second & 10 parts polutants added per week and do the math.
You will normalize at about 1/2 your daily waste production with a variance of 1 seconds waste production.
Daily Waste = 1.428571428571428571428571<bar>428571</bar>
Normalize at 0.714285714285714285714285<bar>714285</bar>
Remember changing the frequency and the amount in proportion will only change the variance not the normalization so changing 1/12th every hour will still be the same just a difference variance. you will fluctuate 1 hours waste over the normal line.
One of my previous roommates was a Phd and math professor (go figure). He had some math tricks that he came up with and the math would always lie. His best one was if you had a carpet and cut one square foot out and the remaining was cut into specific sized shapes and triangles, rearranged and sewn (taped) back together...you would get the same size as the original carpet plus the one square foot. Doing this the number of times as the square footage of the carpet would give you two of the original carpets. Obviously this can not be done but the math said it could. I asked several other math professors and the best answer I got that wasn't a confused stare was it violated Pythagoreans Theorem, but he couldn't tell me why.
That's especially funny hearing it from you (our inside joke).That is what mathematitioners call an asymptote (gotta thank Dubbya for the word mathematitioners)
Don't tell the engineers!!!
