The ground pod is glued to the clean and dry aquarium bottom with silicone adhesive. Each CoralTray should be fixed to the aquarium bottom in at least 2 places to prevent it from floating away during strong currents or low loading.
Suitable for glass and acrylic glass ("Plexiglas", PMMA)
You need a suitable glue.
Do not use on polyethylene (PE) or polypropylene (PP) bottoms because the anchors would not stick.