How many needed for 75 gal saltwater fowlr tank?

Every aquarium is different, it depends on filtration type and bio load. Bio load is the first thing to be considered. A 10 gallon tank with 10 fish needs more media than a 100 gallon tank with 1 fish. Generally speaking 1 box of this ceramic media can handle 40gal high bio load / 80gal medium bio load / 120gal low bio load. Saltwater tanks need more media as saltwater fish is more sensitive to ammonia and nitrite compare to freshwater species. Filter types need to be considered as well: Hang on back filter, canister filter or wet dry system require LESS media. Because all water entering filter is pushed through the media, makes the filtration highly efficient. If the media is placed in tank or sump, MORE media is recommended.

Cross section size (approximate)?

Each piece measures 4” x 1 1/8” x 1 1/8”

Should I arrange these vertically to allow for water flow through, for stack horizontally to provide water reisistance?

IMO, if the media is placed in low flow area, arrange it vertically will allow more water to pass through. If flow is strong enough, arrange horizontally will increase contact time. Either way works.

About 8 of the pieces floats and cant get them to sit at the bottom of my tank. Any suggestions?

I silicone mine in together in groups of 6. Just a dab works great

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Ceramic Bio Filter Media Vast Surface Area for Aquarium Sump Canister (1 Box / 24 pcs)

Product ID: 311603401

Details

Brand
Reefing Art
Item form
Granules
Item weight
1.75 Pounds
Liquid volume
1.75 Liters
Number of Packs
1

🌊1.75L vast porous surface area

🧩24 pcs per box for modular filtration

🛡️100% non-metallic, aquarium-safe ceramic

EC$211

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Description

🐠 Elevate your aquarium’s ecosystem with next-level bio filtration!

SAFE DURABLE - Non-metallic ceramic won’t leach harmful metals
TRUSTED QUALITY - Top-rated with 4.7 stars from 786 aquarists
BULK PACK ADVANTAGE - 24 pieces per box for extended filtration capacity
MAXIMIZE WATER CLARITY - Vast porous structure removes ammonia & nitrite efficiently
VERSATILE COMPATIBILITY - Perfect for freshwater, pond, and saltwater tanks

Reefing Art Ceramic Bio Filter Media offers 24 high-efficiency ceramic pieces with a vast porous surface area (1.75L total) designed to remove harmful ammonia and nitrite from freshwater, pond, and saltwater aquariums. Made from 100% aquarium-safe, non-metallic ceramic, this filter media ensures superior biological filtration without leaching metals, trusted by thousands of fish enthusiasts worldwide.

Specifications

ASIN	B07V1D6LXW
Best Sellers Rank	#27,442 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,680 in Aquarium Accessories
Brand Name	Reefing Art
Customer Reviews	4.7 4.7 out of 5 stars (786)
Item Form	Granules
Item Weight	794 g
Liquid Volume	1.75 Liters
Manufacturer	Reefing Art
Manufacturer Part Number	1
Model Number	1
Number of Packs	1
Pet Type	Fish
Target Species	Fish
Unit Count	24 Count

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TrustScore 4.5 | 7,300+ reviews

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EC$211

Duties & taxes included

In stock

Sold byAmazon Saint Vincent and the GrenadinesDelivered 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 Saint Vincent and the Grenadines.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

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The delivery time was excellent, and the packaging was secure.

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