Hi people wonder if anyone can help me i have had a pond in my garden for
about 3 years now and everything has been runing lovely until i just
notice that 2 of my gold fish have scales missing and also one of them has
a block spot on it, apart from this the goldfish are alert feeding well
and acting normal for goldfish. the pond is 6ft by 5ft and just over 3
feet deep, i have changed the filter and the water is clear, what action
should i be takin with this?