hi, my comet goldfish have...

Question
hi, my comet goldfish have yellow stain on the bottom. Is it infectious?
Some of my goldfishes have a red streak on the fin, is it suffering from fin rot?

Answer
Hi Penny;

What size tank do you have?
How long has it been set up?
How many goldfish do you have?
How big are they?
How often do you change the water in the tank and vacuum the gravel?
Does the tank have a heater?

The 'yellow stain' you are referring to; is it on the fish or somewhere in the tank? What it a sudden development or something that happened over time?

Followups welcome

At Your Service;
Chris Robbins

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