Here's a link to a homemade buffer recipe, it uses baking soda and epsom salt, and marine salt, and is much less expensive that the commercial buffers.
[URL="http/www.cichlid-forum.com/articles/buffer_recipe.php"]http/www.cichlid-forum.com/articles/buffer_recipe.php[/URL]
you can actually buy lake malaiwi salts that mimic the water conditions of the lake, its about £8 for 250g iirc
works good,
thats something like i was looking for, thanks. do you use it yourself ?