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Aquarium Lid Net Cover Kit 48 inch x 31 inch - Red Sea


Item #: RS42082

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In Stock

With a sleek profile and minimalist hangers, the Red Sea Net Cover blends in seamlessly, even on ultra-clear, rimless, open-top aquariums.

The extra strong aluminum frame and purpose designed components allow the extra thin transparent net cover to be customized to accommodate rim-mounted equipment such as lighting arms, auto-feeders and overflow boxes.

Designed specifically for rimless tanks the Red Sea cover also works well with braced tanks such as the MAX® S-series.


  • Suitable for most open-top aquariums up to 48"
  • Extra strong, customized aluminum profiles
  • 8mm (5/16") thin strand, transparent netting
  • Mesh hole size of 1/4"
  • Inside-rim or on-rim mounting options
  • Includes components for one customized cut-out for filters
  • Components available to accommodate additional rim-mounted equipment
  • Includes spline roller

What comes with it?

  • Aluminum frame sections/profiles
  • Internal and external frame corners
  • Spacers and hangers
  • 8mm (5/16") netting, which can be cut to size
  • Spline rubber for attaching the net to the frame
  • Spline roller for inserting the spline

Have mounted equipment on your rim?

Try the Red Sea Zig-Zag Kit to go around your light mounts or auto-feeders.

General Aquarium Selection Chart

Net Cover Dimensions: 120x80cm / 48"x31" (Item #RS42082) 180x80cm / 72"x31" (Item #RS42084)
External Corner (A) 6 10
Internal Corner (B) 2 2
Hanger (C) 6 10
Front Spacer (D) 1 3
Back Spacer (E) 1 3
Profile (P1) 118cm / 46.4" x 2 179cm / 70.4" x 2
Side & Space Profile (P2) 75cm / 29.5" x 3 75cm / 29.5" x 5
Cut out Profile (P3) 10cm / 3.9" x 2 10cm / 3.9" x 2
Spline (S) 6m / 16.9ft 8m / 26.2ft
Net (N) 3m / 9.8ft 4m / 13.1ft
Spline Roller (R) 1 1

Red Sea Aquarium Selection chart

Red Sea Tank Model Net Cover Dimensions Required number of Zig-Zag Accessory Kits (RS42085) Customized cut-out parts Extra parts for Split Screen
REEFER Nano 60x60cm / 24"x24" Included
REEFER 170 / DLX 60x60cm / 24"x24" Included
REEFER 170 / DLX Universal Mount***60x60cm / 24"x24"  1 Included
REEFER 250 / DLX Fixed Mount** 90x60cm / 35"x23" Included
REEFER 250 DLX Universal Mount*** 90x60cm / 36"x24" 1 Included
REEFER 350 / DLX Fixed Mount** 120x80cm / 48"x31" Included
REEFER 350 DLX Universal Mount*** 120x80cm / 48"x31" 2 Included
REEFER XL 425 / DLX Fixed Mount** 120x80cm / 48"x31" Included
REEFER XL 425 DLX Universal Mount*** 120x80cm / 48"x31" 2 Included
REEFER 450 / DLX Fixed Mount** 150x80cm / 60"x31" Included Included
REEFER XL 525 / DLX Fixed Mount** 150x80cm / 60"x31" Included Included
REEFER XL 525 DLX Universal Mount*** 150x80cm / 60"x31" 3 Included Included
REEFER XXL 625 150x80cm / 60"x31" Included Included
REEFER XXL 625 DLX 150x80cm / 60"x31" 3 Included Included
REEFER XXL 750 180x80cm / 72"x31" Included Included
REEFER XXL 750 DLX 180x80cm / 72"x31" 4 Included Included
REEFER Peninsula 500 120x80cm /48"x31" Included Included
REEFER Peninsula 650 180x80cm / 72"x31" Included Included
MAX Nano 60x60cm / 24"x24" Included
MAX E-170 60x60cm / 24"x24" Included
MAX E- 260 90x60cm / 36"x24" Included
MAX S- 400 120x80cm / 48"x31" Included
MAX S- 500 120x80cm / 48"x31" Included
MAX S-650 150x80cm / 60"x31" Included Included

Manufacturer information

With a dedicated team of scientists and other professionals, Red Sea is widely recognized as a leading innovator and manufacturer of quality products for aquarium hobbyists. Red Sea constantly strives to provide hobbyists of all levels with highly effective solution-driven products designed to make your fish-keeping experience as enjoyable and successful as possible.

The embodiment of Red Sea’s dedication to providing solutions for today’s reef-keepers is its range of MAX-NANO, MAX-E & MAX-S aquariums- The only choice for true Plug & Play™ coral reef aquariums, now featuring the very latest in LED lighting technology.

For advanced reef-keepers the Red Sea REEFER provides a great platform into which you can add your own selection of hardware. With its ultra-clear glass, ATO built-in, silent flow valve and superb quality of finish the REEFER sets the standard for those wishing to customize. REEFER is also available as a Deluxe version with LED lighting included.

Red Sea’s unique Reef Care Program (RCP) provides a comprehensive, safe and easy to use program for testing and supplementing within reef aquaria, and is perfectly complemented by Red Sea’s Coral Pro & Red Sea Salt’s, which has become the salt of choice for those seeking the very highest quality water quality for their coral reef aquariums. Both salts are made using a unique natural process which delivers unrivalled homogeneity and is perfect for delicate corals. Check your individual bucket of salt’s composition using Red Sea’s innovative new “MyBatch” software.

Whatever your aquatic needs, Red Sea delivers high quality innovative, solution based products.

3 Stars


Reviewed on
December 05, 2020

No, I would not recommend this.

Could be a lot better.

Pros: Built it correctly and it will fit.

Cons: Quality is lacking. Parts were missing.

Pretty much a pain to assemble. Lots of cutting and assembly. Parts were missing - reached out to Rea Sea and they were extremely difficult to work with.

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Reviewed on
October 24, 2020

No, I would not recommend this.

Ok but not great

Kit is subpar especially for the price. Pain to cut rails unless you have a power saw. Instructions are worthless and video gives no details. Luckily I'm pretty handy and didn't decent job with it.

Was this review helpful? 0 0


Reviewed on
February 04, 2020

Yes, I would recommend this.

Aquarium lid net cover kit

I wasted my money I cut it wrong and it useless to me now.

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Reviewed on
July 05, 2019

Yes, I would recommend this.

Not as bad as you think.

Pros: Really good fit

Cons: Should come with better tools

You just need the right tools and patience. I only gave it 4 stars as I think it should come with a better tool to install the screen. I used one I had from Lowe’s and it made life much easier. Also I glued it together before putting the screen in and it made it a lot easier to put in the screen.

Was this review helpful? 2 0


Reviewed on
June 06, 2019

No, I would not recommend this.

Over priced!!!

Pros: If done right, this Screen kit looks great

Cons: Price

For the price, you pay for this D.I.Y. screen kit, I wished it was at least sized to your particular Red Sea Reefer Aquarium (I have the RSR 425xl). I mean this is made by the Red Sea company, why not? So, I have this D.I.Y. kit, purchased it last year, and still haven't got the nerve or gathered the tools to construct this screen for my 425xl. I've youtubed how to build this product and it seems simple enough (if you have the correct tools). But one mistake and BOOM, you're out of your hard earned money or it will make your high-end aquarium look 2nd rate. I should have done a little more research before I purchased. My advice is to buy this kit only if you have the time and secured in your ability to construct this D.I.Y. screen. Oh and one more thing, I think the screen

Was this review helpful? 0 1


Reviewed on
May 24, 2019

No, I would not recommend this.

A little regretful

Pros: Extra netting, cheap, fast shipping

Cons: Will bow or bend and be lopsided if netting stretched too much

Not every product review goes so swell and my endgame product with this net kit was horrific. I like to have the netting stretched out and straighten my as possible and by doing that the the aluminum pieces are giving in and becoming lopsided. The only nice thing is they give you a lot of extra netting and long enough aluminum so if you make a mistake especially on a smaller tank you can have a little wiggle room to work with. But do not make the netting very stretched or it will bow.

Was this review helpful? 1 0


Reviewed on
March 13, 2019

No, I would not recommend this.

Good idea but hard to put together

Pros: inexpensive, customizable

Cons: hard to attach screen, looks sloppy

The frame came together good although the parts of the frame that were cut looked really rough. The screen was difficult to put on. It constantly tore and it never looked lined up. They would be much better if you could order them fully assembled.

Was this review helpful? 2 0


Reviewed on
January 06, 2019

No, I would not recommend this.

Unsatisfied, low quality to red seas standards

Pros: none

Cons: Flimsy when build, netting is low quality

The trim is easy to cut with a hacksaw and a little filing makes for seamless edges. the net is complete garbage. Coming from a red sea product I'd expect some quality. Creases on the net force you to cut out and choose what side you want to look half decent, the net also rips very easily with little pressure. I had to do it three times to get a semi decent result. Also the netting doesnt hold its shape after a couple of weeks and starts to warp even worse. Will probably end up trashing it and going with a different brand..

Was this review helpful? 1 0


Reviewed on
August 11, 2018

No, I would not recommend this.

Not worth it

Pros: None

Cons: Metal rails, thin tearing mesh.

I'm starting to really doubt marine depot at this point. I should have checked the reviews over on brs before buying here. Each end is metal making each piece a pain to cut, also the mesh is so week I had to order actual lid mesh from brs. Over all I'm going to have a custom lid made. After 2 hrs of messing around with this it's going to a dumpster. 50$ wasted.

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Reviewed on
June 12, 2018

Yes, I would recommend this.

Great product, but take some precautions

First, if you are going to use a hack saw like I did, take care and wrap the piece you want to use in something to keep it from getting marked up. The finish does scratch easily.

The frame went together easy but I was bad at measuring so I had to make a few extra cuts. I did buy a cheap blade for my miter saw, which made cutting the second screen much easier.

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