As an FYI,
Some experts (e.g., Walsted) recommend using vinegar as an easy way to lower pH in a planted tank--but a caution from my own accidental use with non-planted tank: vinegar breaks down into acetic acid which plants eventually can use as carbon dioxide as it further breaks down. Without plants, too much co2
(well if you have to drop the pH as much as I do).
To make matters worse, vinegar to lower pH mixed with bicarbonate soda as an alkaline buffer (which many use) creates 'a volatile form of CARBOLIC acid that quickly precipitates into carbon dioxide'. Yikes.
I lost 5 harlequin rasboras before figuring this out, and almost lost my 5 corys. I'm thinking that they probably survived because of the labyrinth organ.
Now I'm using a smidgen of pH down, until I can slowly acclimate my fish to a higher pH. Can anyone tell me just how high is too high for tropical fish? Tap pH is close to 9 and gh
are below 2, and I'd rather avoid r/o expenses if I can...but not at the cost of fish lives. I figure if I can get them used to 7.8 I'll be happy with far less use of chemicals...