Pseudolithos Migiurtinus Turning Bright Green

[pokie]

Hello all,

I got a P. Migiurtinus a couple of months back. I keep it on an Eastern window under a red/blue grow light. I water it once a week. Substrate is mostly pumice. Over the last 2-3 weeks it turned a brighter green on the side facing the window. Is this a problem?

[Aiko]

Bright green, or white(ish)? A picture will help.

[pokie]

Here you go.

This is how it looks now:

https://imgur.com/a/yPEcft4

And this is how it looked 6 weeks ago:

https://imgur.com/vlUJz4d

[Aiko]

It looks fine. I do hope the pot allows for excess water to run away. This one rots easily when moist for too long.

[pokie]

It has a hole in the bottom and the substrate is very porous - it's about 75% pumice.