Originally Posted by beaslbob
Then discuss this equation:
parameters before water change=value of replacement water+(change between water changes0/(fraction of water change)
And why it is possible to have 0 ammonia,nitrite,nitrates,phosphates and high pH for years with no water changes and a very heavy bioload.
Why inland aquatics in their maintenance systems do a 5% annual water change.
And why people doing water changes still report 1ppm ammonia after weeks of "cyclin g".
That equation isn't an accurate calc of the effects of a water change on parameters. It may seem straightforward but its not. Also it is a recursive calculation meaning the answer feeds back into it repetitively, which is they key to the leveling off.
a(n) = [a(n-1) + w][1-x] + xz, n>=1, a(0)=y
y=starting nitrate in tank b4 1st wc, z=tap parameters, w=buildup of nitrate b4 each wc, x= % wc in decimal, n= # of wc's
If you graph this you will note the tank levels out or I can PM you a file for it. An parameters go much further then just ammonia, nitrite, nitrate, and phosphates.
You have not given us anything that shows your parameters for over 2 years.
Fish produce ammonia, a tank 'cycles' when there are no plants or bacteria to remove this ammonia. They can change all the water they want that doesn't stop the fish from producing ammonia. What it does is keep ammonia levels down so your not killing your fish off constantly while your cycling. Its easy enough to silent cycle a tank without your methods.
Originally Posted by Flear
Mikaila31, ... i'm always going to be chasing that pot at the end of the rainbow.
i call it 'not giving up'
in my frustration with beaslbob about not having any numbers for his aged tanks,
i'm getting an opposite consideration for you, still no numbers though. ... not on your maintained tanks, which considering the topic/thread, is far more important to get a baseline with than considering tanks we are all considering 'unmaintained'
unmaintained is just that, ... useless to compare stats against, ... unmaintained vs. unmaintained, what one has numbers closer to a maintained tank ?, ... first question, "what are some sample numbers for a maintained tank ?
... i'm going to have to look elsewhere.
Some call it delusional...
You want numbers on maintained tanks all you have to do is ask
. All tanks are different which is what you are going to see here. These tanks are maintained with regular water changes that doesn't necessarily make them comparable to my neglected 15g with almost no bioload. You want something directly comparable run an experiment yourself with two identical setups. All these tanks are due for a water change in 1-2 days.
10g - bare bottom, 15-18 H. belheri, snails and hornwort, 50% every 1-2 weeks
gH = 7degrees, kH = 0-1 degrees, NO3 = 30-40ppm, TDS = 200, pH = 7.1
40g Breeder - soil, fertilized, 45-50 fish, snails, shrimp, 50% weekly
gH = 10-11, NO3 = 15ppm, kH = 6, TDS = 250, pH = 7.9
20g - gravel, fertilized, 16-18 fish, 50% weekly
gH = 7, NO3 = 0, kH = 5, TDS = 296, pH = 7.7
Again tap water is
gH = 6, NO3= 0-5, kH=4, TDS = 130, pH = 7.8-8.0
The amusing thing here flear is I haven't seen or heard anything of your tanks. Majority of mine are setup low end or 'on a budget' and pay me back considerably... so I keep getting more -_-
My neglected 15g is hopefully getting redone this weekend and will be a mess. My laziness means it needs a good long CLR acid bath to clean that glass.