QT Tank Question

Provided they are fish safe, they would be fine. I used some brown stripey stones in my betta's tank several years ago. I haven't a clue about the weight though, but if there are too many you can use them for other things. In a small tank you don't want the substrate to be too deep and displace too much water. My QT/hospital tank is bare bottomed. I only put a thin layer of sand in it on the odd occasion that the occupant(s) must have a substrate.

I recommend reading the "Isolation tanks" article in the Fish Articles section of this site.
The information there seems to make good sense to me and differs from that which is commonly proposed.

Just to say that my recommendation to read the article was directed to the two people with queries about QTs, rather than Sue 

Many of the queries people have on the forum can easily be answered by reading the relevant article

Thanks for all your answers and advice regarding my QT tank questions. I read the article this morning too and it is very informative. I hadn't thought of just setting it up when it was required using existing tank water and a filter that was run as a spare in another tank!! I may well do that in future as my other thought had been to use a few of my Glow lights as stock to keep it going when it was not in use.

I have ordered some glass pebbles and everything else is disinfected and thoroughly rinsed and my QT tank stuff is now stored away from my main tank stuff and clearly labelled so there can be no cross infection.

I am holding off buying more fish for now though as my health is not too good at the mo and I'm not up to monitoring it etc.

Thanks again for your help folks.

FC76