Is 1 teaspoon good for a 10 gallon?

1 teaspoon is way way too much for 10 gallons. Less than 1/8th of a teaspoon for 10 gallons - I'd suggest 1/16th.

How much do I use for a 75 gallon tank?

One level teaspoon of ammonium chloride is approximately 4.5 grams, 4.5 grams per 100 gallons of aquarium water will create an ammonia concentration of approximately 4 ppm. I would start with half a teaspoon. Check the level of ammonia, if you still haven’t reached 4ppm then add smaller doses until you do.

Typically you try to keep chlorine out of an aquarium (esp. saltwater). My goal is a fishless cycle; is there a reason to use nh4cl over pure nh3?

My thought is that the dechlorinator used in water changes should remove the chlorine put in when using the Ammonium chloride. It worked for my fishless cycle.

How much do i put in for a 55 gallon tank?

Depends follow Mr Crafty Pants on YouTube.

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Fritz PRO - Ammonium Chloride - 500gm

Product ID: 302421416

Details

Brand
Fritz
Item form
Powder
Liquid volume
1 Cups
Manufacturer
Fritz Aquatics
Unit count
500 Grams

🐠Enables Fishless Aquarium Cycling

⚗️99.9% Pure Ammonium Chloride

🇺🇸Made in USA Quality Assurance

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¥13536

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your aquarium’s ecosystem like a pro—fishless, fearless, flawless!

BULK 500 G SUPPLY - Ample quantity for multiple cycles or large tanks—value meets performance.
FISH FRIENDLY CYCLING - Safely grow nitrifying bacteria before introducing aquatic life.
PURE POTENT FORMULA - Kickstart your aquarium’s nitrogen cycle without risking fish health.
TRUSTED AMERICAN CRAFTSMANSHIP - Manufactured in the USA for consistent, high-quality results.
VERSATILE USE BEYOND AQUARIUMS - Ideal for home chemistry experiments and creative party tricks.

Fritz PRO Ammonium Chloride (500g) is a premium-grade, pure ammonium chloride powder designed to initiate the biological nitrogen cycle in aquariums without fish. Manufactured in the USA, it supports safe, fishless cycling by promoting nitrifying bacteria growth, ensuring a healthy aquatic environment before introducing fish. Perfect for hobbyists seeking a reliable, high-quality solution to establish a thriving aquarium ecosystem.

Specifications

ASIN	B00OTH5TAQ
Allergen Information	Almonds Free
Brand	Fritz
Brand Name	Fritz
Customer Reviews	4.7 out of 5 stars 4,042 Reviews
Global Trade Identification Number	00080531895009
Included Components	89500
Item Form	Powder
Item Type Name	Fritz PRO - Ammonium Chloride - 500gm
Item form	Powder
Liquid Volume	1 Cups
Liquid volume	1 Cups
Manufacturer	Fritz Aquatics
Manufacturer Part Number	89500
Model Number	89500
Target Species	Fish
UPC	781163682493 080531895009
Unit Count	500 Grams
Unit count	500 Grams

Reviews

A**.

Pure salty liquorice powder

19.02.2026

G**A

Works and plentiful left.

13.11.2021

L**H

Good

26.03.2024

D**S

Fast & lots of product. Works as intended.

6.11.2025

A**R

Great product

3.09.2022

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