Will algae grow with just this product, light, and saltwater?

Assuming you’re adding a heater too, yes

My sandbed is 1”. Is it okay to add this to an established tank with fish/coral?

I really don't recommend it. It will cloud the tank severely and leave a powdery covering on everything.

Will this really cycle a new tank instantly? Seems too good to be true.

Nothing, I repeat nothing cycles a tank instantly This will help kickstart a cycle but requires an ammonia source and time.

Do you have to add anything else to tap water to make this fish safe?

As long as you don’t have any live stock you can just add tap water I would personally use dechlorinated water

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🪸 Elevate your reef game with Nature’s Ocean – where science meets vibrant marine life!

PRECISION GRAIN SIZE - 1.0 to 2.5 mm granules ensure perfect substrate texture for natural biological filtration.
P H STABILITY BUFFERING - Maintains ideal pH levels with superior buffering capacity, protecting delicate marine life.
NITRATE AMMONIA CONTROL - Effectively removes harmful nitrogenous waste, keeping your tank crystal clear and fish happy.
INSTANT BIO ACTIVE CYCLING - Kickstart your reef tank with guaranteed rapid cycling for a thriving aquatic ecosystem.
PRO LEVEL STOCKING GUIDANCE - Use 1 lb per gallon and introduce fish gradually for a seamless, stress-free reef setup.

Nature's Ocean Bio-Activ Live Aragonite Reef Substrate is an 8 lb premium granulated substrate (1.0-2.5 mm) designed to instantly remove ammonia, nitrite, and reduce nitrate levels. It enhances buffering capacity to maintain stable pH, guaranteeing rapid tank cycling and a healthy environment for saltwater fish and coral.

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