Maintain black white colour Of Panda Dragon Eye, Is there a special requirement to maintain the colour of Panda Moor? Options

[Ray Ng]

I have tried keeping Panda Moors a few times and most of them ended up being "bleached"; meaning the black color disappears as they grow (usually takes about 6 months). Is there some tips on maintaining the panda look of these moors?

I have one Panda moor kept in an outdoor tub with algae wall and another kept in a sheltered fish tank. Both of them turn white after a while. I was just wondering what could be the right environment for pandas. My setup all uses coral chips and the ph is quite stable.

Just an extra note; panda kept in the outdoor tub begins to show "flesh coloration tint under” its white skin area. I'm not sure whether this phenomenon was a result from feeding too much from the algae wall.

Hope someone can enlighten me