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
Item weight
0.46 Kilograms
Liquid volume
1 Cups
Unit count
500 Grams

🐠Fishless aquarium cycling starter

⚗️99.9% pure ammonium chloride

🇺🇸Made in the USA, premium quality

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€ 55.24

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Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡️ Power up your aquarium’s biofilter—fishless, flawless, and future-ready!

EASY TO USE POWDER - Convenient 500gm powder form dissolves quickly, making aquarium setup and maintenance hassle-free and precise.
HIGHLY RATED PROVEN - Join over 4,000 satisfied aquarists who trust Fritz PRO for a seamless, stress-free cycling experience.
PURE POTENT FORMULA - Kickstart your aquarium’s nitrogen cycle with 99.9% pure ammonium chloride for reliable, fish-safe biofilter development.
FISHLESS CYCLING CHAMPION - Eliminate guesswork—grow nitrifying bacteria without risking your aquatic pets, ensuring a healthy tank from day one.
TRUSTED AMERICAN CRAFTSMANSHIP - Proudly made in the USA with premium-grade materials, guaranteeing consistent quality and performance.

Fritz PRO Ammonium Chloride (500gm) is a high-purity, USA-made powder designed to initiate the nitrogen cycle in aquariums without fish. It provides a safe ammonia source to cultivate nitrifying bacteria, ensuring a healthy aquatic environment before introducing fish.

Specifications

ASIN	B00OTH5TAQ
Allergen Information	Almonds Free
Brand Name	Fritz
Customer Reviews	4.7 4.7 out of 5 stars (4,032)
Global Trade Identification Number	00080531895009
Included Components	89500
Item Form	Powder
Item Type Name	Fritz PRO - Ammonium Chloride - 500gm
Item Weight	0.46 Kilograms
Liquid Volume	1 Cups
Manufacturer	Fritz Aquatics
Manufacturer Part Number	89500
Model Number	89500
Target Species	Fish
UPC	781163682493 080531895009
Unit Count	500 Grams

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