Could you put sand in this and use it as a fluidized bed filter?

I do. I put filter floss under the sponges to prevent sand from falling to the bottom. Used pool filtration sand and branched off from my primary pump with a valve to adjust water flow. I don't use the included pump but I don't see why you cant. Works great for me!

Is the pump that it comes with a submersible or not

I'm confused how any pump that's not submerged would even work? That's kind of the point of the pump, to be submerged in water so that it pumps into the media...

What are the exact internal diameter of the hoses?

From what I can measure, its 7/16 in. inner diameter and 1/2 in. outer diameter

What size tubing I can use for the aquatop Mr 20 to replace the clear tubing that came with it with a black tube ?

7/16 inch inner diameter, 1/2 inch outer diameter

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MR-20 Media Reactor – 95 GPH Up-Flow Filtration System – With Pump, Tubing & Mount – For Saltwater or Freshwater Aquariums – Sump or Hang-On Design

Product ID: 2956419

Details

Brand
Aquatop
Color
Multi
Item Weight
4.54 g
Material
Resin
Maximum Flow Rate
2 gpm
Maximum Lifting Height
15 inches

💧95 GPH up-flow filtration

🔧Versatile sump or hang-on mount

⚙️Includes SWP-230 submersible pump

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Description

💧 Elevate your aquarium’s clarity with next-level filtration power!

CONSISTENT CLEAN FLOW - SWP-230 pump with sediment discharge filter guarantees reliable, clog-free operation.
FLEXIBLE INSTALLATION - Mount inside sump or hang on tank side to fit your aquarium setup perfectly.
ALL IN ONE READY SETUP - Comes complete with pump, tubing, suction cups, and tank hook—plug and play convenience.
DURABLE USER FRIENDLY - Acrylic housing with recessed O-ring lid ensures easy, mess-free media changes.
MAXIMIZED MEDIA EFFICIENCY - Up-flow design eliminates channeling for superior filtration performance.

The AQUATOP MR-20 Media Reactor is a high-performance 95 GPH up-flow filtration system designed for both saltwater and freshwater aquariums. Featuring a durable acrylic housing, it includes a powerful SWP-230 submersible pump and all necessary tubing and mounting accessories for flexible sump or hang-on installation. Its innovative reverse water flow design maximizes filter media efficiency, ensuring cleaner, healthier aquatic environments with minimal maintenance.

Specifications

ASIN	B00GYG54O6
ASIN	B00GYG54O6
Best Sellers Rank	#64,654 in Pet Supplies ( See Top 100 in Pet Supplies ) #302 in Aquarium Filters
Brand Name	Aquatop
Color	Multi
Customer Reviews	4.0 4.0 out of 5 stars (416)
Date First Available	November 27, 2013
Flow Rate	2 gpm
Global Trade Identification Number	00819603014037
Included Components	AQUATOP MR-20 Multimedia Reactor with Pump
Item Dimensions L x W x H	3.5"L x 2.5"W x 15"H
Item Type Name	AQUATOP MR-20 Multimedia Reactor with Pump
Item Weight	4.54 g
Item model number	MR-20
Manufacturer	Aquatop
Manufacturer	Aquatop
Manufacturer Part Number	003567
Manufacturer Warranty Description	1 Year Manufacturer Warranty
Material Type	Resin
Maximum Lifting Height	15 inches
Model Number	MR-20
Number of Items	1
Power Source	Corded Electric
Product Dimensions	3.5 x 2.5 x 15 inches; 0.16 ounces
Product Style	Multimedia Reactor with Pump
Specific Uses For Product	aquarium pump
UPC	781163721697 819603014037
Unit Count	1 Count
Voltage	120 volts

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111350CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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