One of the acans not opening fully

[lastlight]

i find every now and then a colony will deflate and look like that or much 'worse' for a day or two and then be back as if nothing happened. nearly all my frags/colonies take their turn.

doesn't mean it's ok i suppose but it happens to me.

i have the exact same two acans (i think the two on the right are the same) and the green one has always expanded much fluffier than the red/purple one.