Playing with the latest (?) beta from the Prolific web site (shows as version 6218). In version 6216 I complained that, in my opinion, the selection was backwards.... checking fewer plants should show fewer plants..... but it seemed to work the other way around. un checking would show fewer.
With this version "none" (plants or tanks) of the selections work... checking or not makes no difference. I can cycle throught the various versions with "P". If I set to automatically cycle the tanks every 20 seconds I see the various tanks but not the pond or the big tank.