Is this fine calcite ?

I don’t know the difference between fine or cores but it seems pretty fine to me

i have 2.5 x 20inch refillable filter... how many of this will fill it

Less than 1. This bag is almost 1 cubic foot in volume. Your filter is about .22 cubic feet. Of a bigger concen may be the mesh size (for contact area and is not listed), and the % calcium carbonate also not listed.

Why does the bag say limestone? is this limestone or calcite?

Calcite is a naturally-occurring mineral rock (limestone) consisting of approximately 95% calcium carbonate and 3% magnesium carbonate.

Calcite Calcium Carbonate Ph Filter Media 1 2 Cu Ft

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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HK$4587

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Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Elevate your water game with natural pH perfection!

OPTIMIZED FLOW RATES - Designed for 8 GPM backwash and 6 GPM service flow to maximize filter efficiency.
PRECISION VOLUME CONTROL - 0.5 cubic feet per bag fits perfectly in standard 8"x44" tanks for hassle-free installation.
BALANCED P H BALANCED LIFE - Naturally neutralizes acidic water to protect your pipes and appliances.
SAY GOODBYE TO STAINS CORROSION - Effectively prevents blue/green staining and pinholes in copper plumbing, preserving your home’s value.
ANNUAL REFRESH YEAR ROUND PROTECTION - Media replenishment once a year keeps your water chemistry in check without constant maintenance.

Calcite pH Filter Media offers 0.5 cubic feet of naturally occurring calcium carbonate designed for slow, controlled neutralization of acidic water. Ideal for 8"x44" tank systems, it requires 8 GPM backwash and 6 GPM service flow rates, ensuring efficient pH correction and protection against pipe corrosion and staining. Annual media replenishment keeps your water chemistry balanced, making it a reliable, low-maintenance solution for healthier plumbing.

Specifications

ASIN	B004Q0GFNG
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#84,778 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,290 in Aquarium Filter Accessories
Customer Reviews	4.5 4.5 out of 5 stars (212)
Date First Available	February 28, 2011
Included Components	calcite
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Item Weight	50 pounds
Item model number	CLCT-05
Manufacturer	Abundant Flow Waer
Material	Copper
Part Number	FM-CLCT-05
Product Dimensions	14 x 14 x 6 inches
Size	478 Fl Oz (Pack of 1)

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