I first found Thinkfish in 2006 when it was on the old host. I know the date because I joined 2 forums at the same time and the other one has the joining date in my profile.
With the exception of pygmy cories, which was recent within the last year, all the fish profiles on Thinkfish were already here in 2006. They may have been considered accurate when they were written, but things move on in fish keeping. I always use Seriously Fish for information on any given species as that site is constantly updated.
I am not infallible
I was under the impression that all gouramis were soft water fish, but I have now looked on Seriously Fish and discovered that dwarf gourami hardness range is 2 to 18 dH, or36 to 321 ppm. So I looked at my second go-to site, FishBase, and they say 5 to 19 dH.
I have to confess I am most surprised
![Grin ;D](https://forums.thinkfish.co.uk/Smileys/emotions/grin.gif)
But my comment of dwarf gourami disease still stands. This alone puts me off dwarf gouramis. if you really, really want them, look at all the fish in the shop tank. If any are a bit thin, or have sores on them don't get gouramis from that shop.
Some shops only sell males because females 'are so plain and boring no-one will buy them'. If you find a shop like this, go somewhere else.