How fast do flowerhorns grow?

for any tank size, care and what maybe used, how fast and how long will a usual flowerhorn live
Answers:
For "any tank size" - upto 8 inches, colors will not flourish as well. If properly cared for and given a spacious tank, upto 14-16 inches with bright colors.

"Any Tank Size" - should not be less than 25-30 gallon.

Fh's live for about 10 years.

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Flower Horn may grow up to approximately12 inches in length depending on its breed and may live to 8 to 10 years.

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At first they grow quite fast, and you'll see a juvenile reach 6-7" in 6-8 months. The larger they get, they slower they grow, and it can take a couple of years to reach near full size - they keep growing a long, long time though, however slow it gets. If you keep it for their full lifespan, which can be up to 15 years, you'll have a fully grown fish of approximately 12". If you want to see them grow nicely, to full size, and live long, a 75 gallon is a minimum for these guys - 25 gallon is pretty much a prison cell for them.

But, there is no answer for 'any size tank', because too small a tank will slow their growth, as will poor water quality or diet. In addition, overfeeding a fish will increase growth, but force feeding for growth is not good for long term health and beauty of the fish.