Carbon is widely misunderstood, so it is worth being specific about which problems it solves.

• It does remove dissolved organic compounds, the yellow tint that builds in an established tank, tannins leaching from driftwood, odours, chlorine, and medication left over after a treatment course.
• It does not remove ammonia, nitrite or nitrate. Those are the biological filter's job, and carbon has no meaningful effect on any of them.
• It does not clear green water, control algae on glass, or affect pH.
• It cannot be recharged. Baking or rinsing spent aquarium carbon does not restore it. Once the adsorption sites are occupied, they stay occupied.

The Bioscape PRO 1050 L/h canister runs three replaceable media packs. They are not interchangeable, and this page covers the chemical stage only.

The other two stages: BIS540A sponge set and BIS540C pre-filter foam 4 pack.

BIS540B is cut for the 1050 L/h canister body. The three PRO models have different body diameters and take different carbon packs.

It does not fit the Bioscape Tropic canisters, the Bioscape Stainless Steel canisters or any Bioscape hang-on filter. The model code is printed on the canister body.

• Remove carbon before medicating. Activated carbon adsorbs most aquarium medications, which means a full dose can be stripped out of the water within hours and the treatment simply will not work. Take the carbon out before you start a course, and fit a fresh pack afterwards to clear the residue.
• Do not leave exhausted carbon in the filter indefinitely. Spent carbon stops adsorbing and becomes an additional flow restriction taking up space that could hold working media.
• Rinse before fitting. A brief rinse under running water clears carbon dust that would otherwise cloud the tank on start-up.

• Diarise it. Carbon gives no visual cue when it is exhausted — it looks identical on week one and week ten. Write the fitting date somewhere you will see it.
• Change it with the fine wool. Both are on the same 4 to 6 week interval, so one service handles both stages.
• You do not have to run it continuously. Many keepers run carbon only after medicating, after adding new driftwood, or when water starts to yellow. Running it permanently is a choice, not a requirement.
• Leave the biological media alone when you swap the carbon. The ceramic noodles and bio-balls hold your bacterial colony.

• Bioscape 1050L/h Canister Sponges (BIS540A) — same 4 to 6 week interval, so hold both and service the filter once.
• Bioscape 1050L/h Canister Pre-Filter Foam 4 Pack (BIS540C) — the coarse stage that keeps debris off your carbon so it is spent by dissolved organics rather than clogged by muck.
• Bioscape Premium Carbon Pouches — loose pouched carbon for running an extra chemical stage, or for a short course in another filter.
• Bioscape PRO 1050LPH Canister Filter — the filter this pack is cut for.

Bioscape warrants the PRO canister filters for 2 years. Filter media is a consumable and is not covered by that term. Your rights under the Australian Consumer Law apply to this product and are not limited by any manufacturer's warranty. Ships as a standard parcel.

How often should the BIS540B carbon be replaced?

Bioscape specifies every 4 to 6 weeks in the PRO canister range. Carbon gives no visual sign of exhaustion, so replace it on the calendar rather than waiting for the water to change. A pack left in for months is doing nothing except occupying media space.

Does activated carbon remove medication from the tank?

Yes, and this is the most common reason a treatment fails. Carbon adsorbs most aquarium medications, often within hours of dosing. Remove the carbon pack before starting a treatment course, then fit a fresh pack once the course is finished to strip out the remaining residue.

Does carbon remove ammonia or nitrate?

No. Activated carbon has no meaningful effect on ammonia, nitrite or nitrate. Ammonia and nitrite are handled by the biological media, and nitrate comes down through water changes or plant uptake. Carbon targets dissolved organics, tannins, odours and medication residue.

Can I recharge or reuse the carbon?

No. Baking, boiling or rinsing spent aquarium carbon does not restore its adsorption capacity. Once the sites are occupied they stay occupied, and the pack should be replaced.

Do I need to run carbon all the time?

No, it is optional. Plenty of keepers run carbon only when there is a specific job for it — clearing tannins from new driftwood, removing medication after a course, or lifting the yellow tint out of an established tank. A planted tank running without carbon is perfectly normal.

Will BIS540B fit my 1620 or 2000 L/h Bioscape canister?

No. The 1620 L/h model takes BIS541B and the 2000 L/h takes BIS542B. The three PRO canisters have different body diameters, so the packs are not interchangeable.