Fungus and water moulds – what are they? Fungus is a common fish disease that can prove fatal if not treated early. Most fungal infections involve water moulds from the class Oomycetes (a group of fungi with similar characteristics). Although there are several water moulds that can affect fish, the most common and significant water ..

Read more

Skin flukes (Gyrodactylus ) and gill flukes (Dactylogyrus ) and fish health Skin and gill flukes are common fish parasites and in small numbers probably cause little harm. In large numbers both skin and gill flukes represent a serious threat to fish health. Flukes can cause lesions and tissue damage as well as producing side affects such as ..

Read more

Dermocystidium. koi Identifying Dermocystidium Dermocystidium. koi  is an uncommon fish disease affecting koi although there are reports that other species may be affected. As its name suggests, Dermocystidium is a disease that affects the skin of koi and can be found on the gills, fins or body. It causes raised swellings varying in size from 1-2 cms to ..

Read more

A common parasite As with many fish parasites, small numbers of Costia (or more correctly Ichthyobodo) are not uncommon and appear not be detrimental to the fish’s health. In small numbers these parasites seem to live on cellular debris in a commensalistic relationship with their fish host. Costia  occasionally live on the skin and gills of healthy fish and it ..

Read more

Even one parasite warrants immediate action The parasite Chilodonella is a major threat to fish health and finding even one parasite warrants immediate treatment. Chilodonella is a potentially dangerous  parasite for two reasons. First, unlike many parasites, it has a wide range of temperature tolerance and outbreaks often occur at low temperatures when fish are least able to resist. ..

Read more

Click the right-hand mouse button if you want to down-load any of the movies (click “save target as….). The file sizes have been kept reasonably small, hopefully without losing too much detail – they will take a minute or two to download- depending on your modem speed.  Let them fully download before playing them. If ..

Read more

Practice make perfect Although the microscope is a fairly simple instrument to set up and use, interpreting what you see can sometimes be difficult.  It really requires practice until such times as you know what is normal and what is not. As a piece of advice I would suggest familiarizing yourself with healthy or non-urgent ..

Read more

Setting up The most common cause of disappointing results is poor setting up of the microscope before use. The performance of almost all microscopes can be improved if a little time is spent focusing before use. No matter what quality microscope you buy, it makes sense to get the best possible image it is capable ..

Read more