What kind of sand will i need

I think you should google "how to choose aquarium substrate". I'm far from an expert but many factors go into choosing like: is your tank freshwater or saltwater, do your fish need to burrow, do your fish like to sift the substrate, are you going to keep plants in the tank. Once you set up a tank, the substrate will probably be the hardest thing to change. Good luck!

How much & big is 5 lbs?

I’ve bought about 5-6 separate 5 pound boxes. Each box holds about 5-7 medium size rocks. 4-7 inches in size. Great rock to scape with easy to work with.

Is this real limestone? Im hoping it will help raise the ph and harden the water in my aquarium

Yes, it's oolitic limestone, they just cut it to make the stax shapes.

How many boxes are good for 12 gallons?

If there are no other rocks already in the tank, I would use 2-3 boxes. It is better to have extras than look barren. I supplemented my 55 gallon tank with just one box but I had four large rocks in already.

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STAX by 5 lb

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Brand
Two Little
Flavor
Unflavored
Age Range (Description)
All Life
Item Form
Stick
Special Ingredients
Limestone

🌊Marine & freshwater ready

🪨Flat, stackable limestone

♻️100% natural & sustainable

Description

🪨 Stack your style, sustainably and effortlessly!

CORAL READY BASE - Ideal foundation for coral frags using AquaStik or CorAffix adhesives.
ECO CHIC CHEMICAL FREE - Sustainably sourced limestone with zero additives or pests.
INSTANT AQUARIUM UPGRADE - No curing needed—start building your dream aquascape immediately.
EFFORTLESS AQUASCAPING MASTERY - Flat, dual-sided surfaces for secure, gravity-defying stacks.
VERSATILE AQUARIUM COMPATIBILITY - Perfectly crafted for both marine and freshwater ecosystems.

Two Little Fishies STAX offers 5 lbs of flat, porous oolitic limestone rocks designed for layered aquascaping in marine and freshwater tanks. Each piece features flat surfaces for easy stacking and is 100% natural, sustainably collected, and reef-safe—ready to use without curing. Perfect for creating stable, creative structures and serving as a coral frag base.

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