I have a 100ltr tank with GBR's (pair).

I cannot seem to get them to stop itching! :dunno: (Not ich)

My parameters are spot on, I do water changes (good filtered water 30% every 3 days) I have an eheim external canister that is more then adequate.

I have used formalin 5% because I know flukes can be a problem...but still itching.

Thinking about a UV system, the ones you see on trademe for $60-$80.

Comments please.

Thanks

parameters

ph 7

nitrites 0

nitrates 0

Ammonia 0

Have you checked for velvet? Easiest way is to wait until it is dark and with the lights out look at them with a torch. If whitespot looks like they are sprinkled with salt then velvet looks like they are sprinkled with pepper. If it is not that then I would look at gyrodactylus. The skin usually looks milky but can realy only be confirmed with a skin scrape under a microscope.

If you really want a UV unit, www.fish-street.com has some cheap ones that do a pretty good job.