Sounds like an interesting DP that...
Or rather an interesting person working in the lfs. Every time I think I've heard it all from such people, they say something that make me almost go into shock
I really liked the idea of the DP turning green

It sounds like a vegetable...
If you need more funny stories told by lfs, I do have my share too...
Like "all fish is bred in the same water quality, and therefore all fish is to be kept in ph a little more than 7." Hurray! Life suddenly got easy
Or "all fish kept in aquariums is really BW fishes. That's why you need aquarium salt".
Welcome to lfs in Norway... The same story all over the world it seems.