Carophyll pink is the most effective colour enhancing food additive that I have come across in my 30+ years of fish keeping. It is especially effective for red, orange and pink colour fish. Wether you keep discus, koi, African cichlids, live bearers or anything in between this product will have a positive effect on their red, orange and pink colouration. A little goes a long way with this product. The dosage is 1/4 teaspoon per 1lb of food. I am often asked if this is a hormone and the answer is no. Carophyll pink's active ingredient is man made astaxanthin which is a carotenoid that occurs naturally in many aquatic organisms such as micro algae, shrimp and krill.
This product ships for free within Canada and the USA. International shipping is $15.
This discus below is shown before being fed an astaxanthin enriched diet, then 2 weeks into a astaxanthin enriched diet and finally 4 weeks in. Without astaxanthin in it's diet this fish would never have reached it's full potential in terms of colouration.
This is another remarkable example of the colour improvement that can be achieved after just two weeks of being feed black worms with Carophyll pink added.
This next set of before and after photos is a real extreme example...