The OASE FiltoClear 20000 takes the OASE replacement foam set FiltoClear 20000/30000 (part 51290) as its foam set; Australian sellers list it from A$99.95 as of 28 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your pond filter
OASE FiltoClear 20000
Pond filter
Confirmed against OASE's listConfirmed against OASE's own compatibility list
Not yours? Change
Takes the 51290 foam set
replacement foam set FiltoClear 20000/30000 · check the code on your old part before ordering.
Your pond filter
Pond filter
Confirmed against OASE's listConfirmed against OASE's own compatibility list
Takes the 51290
Foam set · check the code on your old part.
Other OASE pond filters that take the 51290
GenuineGenuine OASE
$357.50
The Fish Works · 28 OctLowest genuine · The Fish Works · checked 28 Oct
CompatibleCompatible option
$99.95
The Fish Works · 28 OctThe Fish Works · checked 28 Oct
Check sellerCheck seller details
Genuine: made by OASE. Compatible: another brand.Genuine is made by OASE. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest compatibleLowest compatible price · $99.95
The Fish Works. Compare with genuine below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.
Compare 2 listings from 1 seller
AUD, before delivery. Each price shows when it was checked.
Compatible options
1 seller
Opens The Fish Works in a new tab. Their page is the source of truth for price, delivery and returns.
How long it lasts
Replace it when it is worn or torn; OASE lists the foams as wear parts and gives no interval.
How to change the foam set in your OASE FiltoClear 20000
Watch the guide or follow the steps.
No clear video for this part yet. The steps cover it.
- 1Unplug the FiltoClear and switch off the pump that feeds it.
- 2Open the lid of the filter.
- 3Take out the foams, noting the order they sit in.
- 4Fit the new foams in the same order, check the lid seal and close the lid.
- 5Switch the pump back on, then plug the filter back in.
Every number this part goes by
- Retail name:
- 11OS001
- Retail name:
- 51290
- Retail name:
- FiltoClear 20000/30000 foam set
Sellers list any of these; they are the same part.
About your OASE FiltoClear 20000
OASE pond filter — FiltoClear pressure filter (earlier range). Its foam set is the replacement foam set FiltoClear 20000/30000, part 51290.
Where the model number is: The model is on the label on the filter's lid or side (OASE FiltoClear 13000, PondMAX PF4500UV), and on the box. Switch the pump and any UV-C lamp off at the power point before you open the filter.
Fits these 2 OASE models
OASE2 models
Common questions
- Which foam set fits the OASE FiltoClear 20000?
- The OASE FiltoClear 20000 takes the OASE replacement foam set FiltoClear 20000/30000 (part 51290).
- Where can I buy the 51290 in Australia?
- We track 1 Australian seller for the 51290; the lowest listed price when we last checked was A$99.95 at The Fish Works. Prices are re-checked daily and dated on this page.
- How do I fit the 51290 in an OASE FiltoClear 20000?
- No tools, a few minutes: 5 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- A torn or worn-out foam lets dirt through to the pump and the water clouds.
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