Thermometer Clip for 13mm Fish Tank Thermometer

A simple thermometer clip for most used 13mm fish tank thermometers. The usually provided suction cups tend to lose force when algae start to grow on the glass panes or when the rubber starts to stiffen.
Can be clipped to 3mm or 4mm glass panes. Maybe also thicker panes (5mm, 6mm) might be possible when bending the clip a bit.
2 versions available: one with flat edges and one with rounded ones.