So if i have an empty 500ml bottle of prime laying around how much safe do i need to add in order for it to be the same as if i were to buy prime?

I make mine in an empty plastic gallon container because more dilute is easier. Prime dosage is 1mL per 10g. You're wanting a total of 500mL to treat 5000g. For Safe, 1/4 of a teaspoon treats 300g. And, just to note, there are 3 teaspoons in a tablespoon. 5000/300=16.667 ||| .25tsp X 16.667 = 4.167 ||| 4.167/3=1.389So, 4.167 teaspoons in the 500mL bottle. Or for simplicity, 1.389 tablespoons. You could probably do 1 tablespoon and another 1/3 tablespoon aka a teaspoon.I've never made Safe so concentrated, you may need to use slightly warmed water to make sure everything gets saturated. Also always shake before you use it.

if 5gr of safe treats 100gal then 250gr treats 5000gal, and 5ml of prime treats 50gal then 500ml treat 5000gal as well and its the same price

1 gram of Safe treats of 200 gallons, 1 ml of Prime 10 gallons. 250 grams of Safe treats of 50,000 gallons, 500 ml of Prime 5,000 gallons. Thus, you get more for your money :).

What is the difference between safe & prime? i currently use prime but am interested in safe for my larger aquarium i just set up

Safe is basically the powdered form of prime, that's what we use in our shop ( we have over 600 aquariums)

Can i recharge purigen with safe?

Yes Please read: http://www.seachem.com/support/forums/forum/general-discussion/1771-is-safe-safe-for-purigen-re-charge strait from the Seachem support

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Safe, 250 g / 8.8 oz

Product ID: 5788177

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Details

Brand
Seachem
Liquid Volume
240000 Liters
Item Weight
10.4 ounces
Item Form
Powder
Manufacturer
Seachem Inc.

🐠Aquarium safe

💧240,000L capacity

⚗️Non-toxic formula

Description

🌊 Dive into a safer aquarium experience!

P H PERFECT - Non-acidic formula that won't disrupt your aquarium's pH balance.
AMMONIA BE GONE - Effectively converts harmful ammonia into a safe form.
TRANSFORM YOUR TANK - Experience crystal-clear water with our concentrated formula!
CYCLE WITH CONFIDENCE - Perfect for tank cycling, alleviating ammonia and nitrite toxicity.
ULTRA CONCENTRATED POWER - More concentrated than Prime, delivering maximum results!

Safe is a highly concentrated aquarium conditioner designed for both fresh and saltwater environments. It effectively removes chlorine, chloramine, and ammonia, converting harmful substances into non-toxic forms that can be easily filtered out. Ideal for tank cycling, this non-acidic powder won't affect pH levels or over-activate skimmers, making it a must-have for any aquarium enthusiast.

Specifications

Item Weight	8.8 ounces
Liquid Volume	240000 Liters
Allergen Information	Abalone Free
Target Species	aquarium
Item Form	Powder

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