Originally Posted by calfishguy
I'm sorry but I can't agree I have kept multiple fish for many years that like low ph at high ph and thy have all had above normal lifespans. I aslso googled the neon tetras ph and most sites say between 6and 7.8 is good. I also checked a few of my reference books and they all say not higher than a ph of 8 I the fish has been properly acclimated. IMO/E they are fine at higher ph if they ate acclimated slowly. However I you decide that your issue is because of your ph I don't recommend using buffers or ph up or down I suggest that you get a different tetra. Messing with your waters Ph can often be a nightmare.
I agree on the latter, messing with pH. But some questions must be asked and comments made concerning the soft vs hard water issue.
I have kept multiple fish for many years that like low ph at high ph and thy have all had above normal lifespans.
Which species, and where did you find the normal lifespan statistics? [Hypothetical question perhaps, to raise the crucial point on this.]
I aslso googled the neon tetras ph and most sites say between 6and 7.8 is good. I also checked a few of my reference books and they all say not higher than a ph of 8 I the fish has been properly acclimated.
Hypothetically again, but who authored the respective sites, and books? The source of the information is the key to its accuracy. As many members have lamented, one can find very conflicting information on the internet. Which should not surprise anyone, since any person is free to set up a web site and write anything without scrutiny from his/her peers. Books are a bit different, though the age can factor in since we are always learning more about fish physiology and the thinking today is not at all equal to what aquarists thought even 20 years ago.
This forum has a profile section, second tab from the left in the blue bar across the top of the page. I wrote most of the freshwater profiles. The neon tetra [when name is identical it will shade, you can click it for the profile] has pH less than 7 and GH less than 4 dGH. These are not numbers I dreamt up, they are from reliable ichthyologists and biologists who have spent years studying these fish. I have several sites I use, and it is rare that I find any conflicts in data, but if I do and the source is reliable, I mention it so that we have a very reliable data set.
Scientific opinion is highly scrutinized; other accredited scientists will challenge any findings, and in the end the truth is obvious. This does not happen with amateur ramblings.
The acclimation really does not do it. One example is the cardinal tetra. Kept in water with a GH above 6 and a pH above 6.5 it will live likely up to 3 years, often only 2. Maintained in very soft acidic water, it has a lifespan--a normal lifespan--of more than 10 years. The late ichthyologist Dr. Jacques Gery wrote this, and there are not many alive who can come close to his extensive ichthyological knowledge when it comes to characidae.
The fish may outwardly appear fine; there are not always external signs of trouble, like loss of colour or less-than-normal behaviours, though sometimes these do occur. Most of these fish will not spawn in hard water, and this clearly tells us again that something is wrong. Many develop blockage of the kidneys from the calcium in hard water; you can't see this externally, the fish just suddenly dies.
Last comment for the present, I have recently been reading more and more articles from prominent aquarists who are becoming stronger in their views about how absolutely essential it is to provide a fish species with water that is as close as possible to their natural preference. What we didn't know even 10 years ago we now do, that maintaining soft water fish outside their norm is causing severe stress because the fish is having to work much harder just to exist. There is a complex chain of internal chemical reactions that keep the pH of the fish’s blood steady, its tissues fed, and the immune system functioning. The fish has to regulate these constantly, and it takes energy; spending additional energy to maintain these functions when the fish is forced to live in unsuitable water means less energy for everything else, and that simply wears the fish down. As I mentioned in my article on salt, this is comparable to driving a car up a steep hill; it takes more gas (energy) to maintain the same speed as on level ground, plus it wears the car out faster (shorter lifespan).