Spider support system comprises of a central ring with heavy duty wires connected to Donaldson tensioners attached to the outside walls of the tank using the tank securing bolts. Use of shade cloth roofing assists in eliminating evaporation & maintains water cleanliness whilst allowing the circulation of fresh air.
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## All roofing systems from 7.5mØ upwards are supplied with the centre support pole with top cap drilled to attach support wires. Poles in addition are contained in a waterproof liner bag, and have a PVC cushion for base.