Two black slotted overflow covers in two sizes, with vertical slots

Slotted Overflow Cover for All-in-One Aquariums, Waterbox & More

Fluval Flex 9 & 15 (Single) / Black
$5.00
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Two black slotted overflow covers in two sizes, with vertical slots
  • Two black slotted overflow covers in two sizes, with vertical slots
  • Black slotted overflow cover with straight vertical slots and side clips, shown at a slight angle
  • Long black slotted overflow cover with many narrow slots and side clips, for a wide overflow opening
  • Black slotted overflow cover at an angle, showing the vertical slots and the snap-in clip on each end
  • Real photo of two black slotted overflow covers of different sizes standing on a beige backdrop.
Slotted Overflow Cover for All-in-One Aquariums, Waterbox & More

Slotted Overflow Cover for All-in-One Aquariums, Waterbox & More

Reviews from our Etsy shop

$5.00

Fits: Fluval Flex 9 & 15 (Single)

Not for: Fluval Flex 9 & 15 Gallon 2.0

Not sure which tank you have?
  • Slots keep fins and fry out with less flow loss than mesh.
  • Good for strong pumps.
  • Snap-in install: no tools, no glue.
  • Flat $4.88 shipping for your whole US order
  • Ships Mon, Wed & Fri. Arrives 2–5 business days after it ships.
  • Damaged or wrong? Refund or a new part within 30 days. Our policy

About this part

Made for high-flow tanks, tanks with lots of fine debris, and betta keepers. This slotted cover keeps betta fins and fish fry out of the overflow and return chambers, with more open area than our fine-mesh cover, so the flow stays strong.

Find your tank in the choices. Each choice is made for the overflow slots of that tank model. The price is for one cover unless the choice says pair or set.

Compatibility
  • Fits: the original Fluval Flex 9 and 15 gallon, the Fluval Spec V 5 gallon and Spec III 2.6, the Imagitarium 3.7, and many all-in-one tanks: JBJ, Innovative Marine, Coralife BioCube, Fiji Cube, Seachem Tidal, Waterbox, Landen, Lifegard, Top Fin and more.
  • Does not fit: the Fluval Flex 2.0 or the Flex 32.5. For the Flex 32.5, see our Flex 32.5 intake covers.
Why it helps
  • Slots keep fins and fry out with less flow loss than mesh.
  • Good for strong pumps.
  • Snap-in install: no tools, no glue.
  • Fluval choices come in black or white.
Installation
  1. Pick your tank model.
  2. Line the cover up with the overflow slots.
  3. Press until it snaps in.
In the box

One slotted overflow cover for the tank you pick (or the pair or set the choice names). For the Flex 9 and 15 single choice, you get the larger upper cover.

Designed and 3D printed in Pennsylvania. One flat shipping price covers your whole US order, so a second part ships for no extra cost.

  • 5 stars: 82 (90%)
  • 4 stars: 4 (4%)
  • 3 stars: 2 (2%)
  • 2 stars: 0 (0%)
  • 1 star: 3 (3%)
R
Randi

These popped right over/on the inlets on the Fluval 32.5. Thought installing the lower two might be an issue, but all was quite easy. Does not restrict flow, but the newer Fluval kits have plenty of water flow. No shrimp gonna make it through these.

Randi review photo
R
Rein van der Wal

Super geregeld.

Had een model die nog niet bestond. De maten doorgeven aan verkoper. Deze heeft ze binnen een dag gemaakt en verzonden.

Rein van der Wal review photo
E
Etsy customer

Item fits perfectly! 2.6G fluval spec with betta. No more sucking him up. Thank you!

Etsy customer review photo
A
Allora Long

Looks great, fits perfectly, does exactly what I needed them to and does it better than the original ones fluval includes. The slots are very delicate so do be careful handling them.

Allora Long review photo
E
Etsy customer

Perfect for preventing a moray eel from escaping into the overflow chamber

Etsy customer review photo
T
Tami Lee

Works like a charm my baby shrimp don’t get sucked through the filter did exactly what I wanted.

Tami Lee review photo
E
Etsy customer

Excellent covers for a 9 gallon Flex with shrimp. Keep in mind that they come with little nubs you will have to cut off for the lower portion of the flex. Seller didn’t mention that and was annoyed when I asked him about the cover not sitting flush.

Etsy customer review photo
S
Steven Gillispie

The shrimp aren't getting past that !

Steven Gillispie review photo
A
Alicia Holtz

Very happy with these vents over the original Fluval. Clipped in with ease. Now I don’t have to worry about my shrimp getting in.

Alicia Holtz review photo
S
Sign in with Apple user

Thanks for getting this out to me fast so I could finish setting up. It fit well and looks good! And thanks for the excellent communication to make sure I got what I needed.

Sign in with Apple user review photo
I
Ida

Very good product. Perfect for my Waterbox 90.3

S
Stephen

Very fast shipping, much appreciated

D
Dean South

No more fish in the filtration!

C
Chris

These items worked great and I will buy more.

M
Mitch xie

Works great fits 100%.
Great customer service.

J
John Welter

Great weir guards to keep small livestock in main display area. Seller was helpful in finding the right size. Will definitely order from again.

S
STACI BARNETT

Awesome product. Did not fit my aquarium, that was my fault. Needed one to fit a 29 gal Uniquarium, ths was just a little too long. Darn it.

S
Sarah Sharpe

All around great designs. Fits existing Fluval flex perfectly.

C
Chuck Dennis

great seller thank you all good

B
BeMong Hoang

I was disappointed because it did not fit

L
Luis A

Great product for customized fluval filter intake

D
Dave

Restricts the flow to much had to modify it to work

T
Tim

Exactly the right fit and flow rate for my IM NUVO Fusion 15 AIO tank. And very responsive seller.

O
Omar Kablawi

Works as described. No issues

C
Cynthia Christensen

they suck, don't fit my water box

J
Jade

A perfect fit for my Fluval Flex!

J
Jordan

Only comes as 1 need to buy multiples if you need 2 didn’t realize that when I ordered lost a goby in through the overflow twice lol

J
Jas

Perfect for my fluval spec v

B
Bliss

Works perfect for my Fluval Spec 5 gallon tank. Thanks for the fast shipping and excellent product.

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