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This is a discussion on Fish within the Freshwater and Tropical Fish forums, part of the Freshwater Fish and Aquariums category; --> I am building a calculator that hopefully calculates the chemical quality of the water for a planted community aquarium. firstly I need to find ...

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Old 10-28-2008, 11:48 AM   #1
 
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I am building a calculator that hopefully calculates the chemical quality of the water for a planted community aquarium. firstly I need to find a function that represents the Q-value of a given pH in a scale of 1 to 100 please rate pH 1-14 on a scale of 1 to 100, 1 being uninhabitable and 100 being ideal for a planted community aquarium. I know different fish need different ph, but I am looking for an average value. As I progress I will post with different questions. once compleated, pending the success of the project, I will be happy to share my claculator with everyone.

Last edited by FuzzAz; 10-28-2008 at 11:57 AM.. Reason: my bad
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Old 10-30-2008, 06:25 PM   #2
 
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You've got to do better for a subject than fish. This is a fish forum, in a fish subforum, so so of course your question is about fish. Try, "PH scale for optimum fish health."

That said, this question has no answer. The pH that's ideal for a given fish is pretty much tied to its natural habitat, be it the particular caves in Central America where the water has enough sulphuric acid in it to burn unprotected skin and the species of molly that live there die if it gets above 3.5 or so, to the rift lakes of Africa, where wild caught fish in particularly alkaline portions of the lakes don't tolerate water much below 8.2 or so. On the other hand, there are fish like Bristlenosed plecos that can handle a range from 4.8 to 8.0 (not happily at the extremes, mind you).

So the ideal pH range is one thing that will be shared by fish in a particular habitat, and the pH tolerance will vary from species to species (generally the more extreme and localized the lower the tolerance, the closer to neutral and more widespread, the more tolerant.) So it simply makes no sense to average them. The best you could do is set up a number of different habitat groups that have similar pH requirements. As for tacking a Q value on that, it's just not going to work because the tolerance range is so wide.

I don't want to be discouraging (except insofar as uninformative subjects go), but you're chasing a chimera here.

Why are you doing this? If it's just for neatness value, your industry is to be lauded, but it's misplaced. If you need to do some sort of project for a class or some-such, there are similar things you could do with pH levels as they relate to aquaria that will actually provide good and applicable information.
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