My Rhodactis and Ricordea Florida are all in the same places they have been for months. There has been no change in lighting. But over the last week or two they have begun to spend their days in this funnel shape. About 2/3 of them now look like this. I had slowed down on feeding, but when I feed them they go right back to this shape. Nitrates have been a little low, but it has happened before with no negative effects. They don't appear to be dying or shrinking. Any ideas?
Sal. - 1.026
pH - 8.1
Nitrate - 4
Phos. - .01
Alk - 7.3
Sal. - 1.026
pH - 8.1
Nitrate - 4
Phos. - .01
Alk - 7.3