Quote:
I am more confused. When doing water changes I am supposed to premix the new water with fertilizer before adding to the tank? I don't remember seeing this in the guide.
The guide says:
"Dose PPS-Pro Solution #1 and PPS-Pro Solution #2 at the same time daily for a week, then 50% water change."
So, I dose 1ml per 10 gallon for a week. This gives me a value of 0.7ppm at the end of the week. Then I do 50% water changes. This means 0.7 / 2 = 0.35ppm (because the new water doesn't contain any fertilizer) + a new dose of 1ml per 10 gallon that day means 0.35+0.11 equal 0.46ppm.
people math differently; people view things from different angles. I guess it's what makes life interesting.
Let's look from your angle:
you said:
This means 0.7 / 2 = 0.35ppm (because the new water doesn't contain any fertilizer) +
a new dose of 1ml per 10 gallon that day means 0.35+0.11 equal 0.46ppm.
but you need to keep going.
day 2 0.46 + 0.11 = 0.57
day 3 0.57 + 0.11 = 0.68
day 4 0.68 + 0.11 = 0.79
day 5 0.79 + 0.11 = 0.90
day 6 0.90 + 0.11 = 1.01
+ rounding up (0.04) -- because you guys did it and it keeps the example more consistent...
day 7 water change 1.05 / 2 = 0.525
repeat above for a week
0.525 + 0.7 = 1.225
water change and repeat
1.225/2 + 0.7 = 1.3125
1.3125/2 + 0.7 = 1.36
1.36/2 + 0.7 = 1.38
1.38/2 + 0.7 = 1.39
1.31/2 + 0.7 = 1.395
1.395/2 + 0.7 = 1.3975
..
..
..
..
..
really close to 1.4! but as @
Edward mentioned, it'll never exceed it.
It's one of those wonderful tricks of math. Where, if you add something and divide by 2, and add it again, and keep repeating, you'll get closer and closer to doubling it.
Perhaps it's more fun to graph it on the same rotalabutterfly site
https://rotalabutterfly.com/accumulation-calculator.php
plug in the numbers
of course, if you talk about consumption, then .. that's another can of worms.