• Pack of two replacement diaphragms — enough to service one pump in a single job.
• Rubber construction — the flexible part that creates the pumping action.
• Matched to the Bioscape Tropic 4000 and 8000 air pumps — identified by part number, not a universal fit.

This diaphragm is matched by part number to the Bioscape Tropic Air Pump 4000 (twin outlet, rated around 180 L/h per outlet, 360 L/h total, 4 W, for tanks up to 300 L) and the Bioscape Tropic Air Pump 8000 (four outlet, rated around 180 L/h per outlet, 720 L/h total, 8 W, for tanks up to 600 L). Physical dimensions of the diaphragm itself are not published by Bioscape or listed by Australian retailers, so check your pump model before ordering.

Suitable for freshwater and marine aquariums running a Bioscape Tropic 4000 or 8000 air pump. Not confirmed for other Bioscape pump series, which use separate diaphragm packs (500/1000, 2000 and 3000 series), or for pumps from other brands.

Switch off and unplug the pump before opening the housing, and replace both diaphragms at the same time rather than one at a time. A pump that runs louder than usual, loses air pressure, or stops pumping altogether often has a perished or torn diaphragm.

Sold as a standard consumable replacement part; any fault on arrival is covered under your consumer guarantee rights under Australian Consumer Law. Ships as a small parcel.

How many diaphragms are in the pack?

Two, enough to service one Bioscape 4000 or 8000 pump in a single job.

Will this fit other Bioscape air pump models?

No. Bioscape lists separate diaphragm packs for its 500/1000, 2000 and 3000 series pumps.

Does this diaphragm suit marine tanks?

Yes, the host pumps are rated by the manufacturer for both freshwater and marine use.