Fish bubble tube support

The vertical fish bubble tubes on sale in Argos and the like are prone to toppling over….8 lt of water all over the floor !!!Wall clamps are available but cost nearly as much as the tube itself, didnt think they looked very nice and seemed a phaff to use so I came up with the attached which uses 25m of filament and costs less than £1The ring simply slips over the tube then positively locates on the wall fixing which is spaced to accommodate standard skirting board thicknessI used PETG as thats the filament I use for everything