I've found some undyed kuwa stems in B&Q, they are just a dry twisty stick really. I'm assuming these will be fine to put in the aquarium. Could someone let me know if not please.
You can see the stems in my sig picture Ryefish. I bought them from B&Q because they had been reduced (one or two stems had been broken) but they are a bit expensive, a cheaper option would be some beech or oak sticks if they are old and dry.
The stems are a bit bright at the moment but should look better after a few weeks when they should darken off.