Why do all the profiles have a ph suggestion?
How do you adjust hardness? I was losing guppies in the community tank cos my water is apparently too soft.
The ph in the pond was 8.4 yesterday, after I added 5 large rescued goldies few days ago.I did a big wc.
Different fish do prefer different water condtions, but pH is just one measure of whats going on with your water chemistry.
Distilled water has a pH of 7, but it's not good for fish as it has no hardness or buffering to keep the pH stable. Some peoples tap water may have a pH of 7, and a low hardness. In that case the lime and organic acids in the water are in a nice balance, and they are lucky. Or you may have very hard water, with the lime giving it a high pH, you add sulphuric acid to the mix, and you can balance it out at pH 7 again, but it's certainly not the same water as the other two. Hardness is higher, and Total Dissolved Solids is even higher with the acid added.
Anyway, if you are keeping African lake cichlids, they prefer hard water and a pH up around 8 as thats like their natural enviroment.
Now if you decide you want to breed Discus, you have a problem. You could dose your water and get the pH down to 6.5, but it's still not going to work for Discus. In that case you need a new source of water, like a R/O filter that has low hardness.
As for your guppies dieing, if you have high pH tap water, chances are it's quite hard, and thats what guppies prefer. Need to find another cause of your problems there.
Ian