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

Details

Brand
Seachem
Item Form
Powder
Item Weight
10.4 ounces
Liquid Volume
240000 Liters
Number of Packs
1

🌊Safe for fresh & salt water

🧪Concentrated dry formula

♻️Detoxifies ammonia & nitrite

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Description

🧼 Keep your aquatic world pristine and thriving with Safe™ — the pro’s choice for flawless water!

P H NEUTRAL POWER - Non-acidic formula that keeps your tank’s pH perfectly balanced
BIOFILTER BOOSTER - Converts toxic ammonia into harmless compounds, enhancing biofilter efficiency
ULTIMATE WATER DETOX - Removes chlorine, chloramine & ammonia for crystal-clear, safe tanks
CYCLE WITH CONFIDENCE - Use during tank cycling to prevent ammonia and nitrite toxicity stress
ULTRA CONCENTRATED DRY FORMULA - More potent than liquid alternatives, saving space and dosing time

Safe™ is a highly concentrated dry aquarium conditioner designed for both fresh and saltwater tanks. It effectively removes harmful chlorine, chloramine, and ammonia by converting ammonia into a non-toxic form that biofilters can easily eliminate. Safe™ supports tank cycling by reducing ammonia and nitrite toxicity without altering pH or overactivating skimmers, making it an essential, space-saving solution for maintaining a healthy aquatic environment.

Specifications

ASIN	B0002A5WOC
ASIN	B0002A5WOC
Allergen Information	Abalone Free
Best Sellers Rank	#12,599 in Pet Supplies ( See Top 100 in Pet Supplies ) #95 in Aquarium Water Treatments
Brand Name	Seachem
Customer Reviews	4.7 4.7 out of 5 stars (3,975)
Date First Available	January 1, 2011
Global Trade Identification Number	00000116038607
Included Components	all
Is Discontinued By Manufacturer	No
Item Form	Powder
Item Type Name	Aquarium conditioner
Item Weight	10.4 ounces
Item model number	386
Liquid Volume	240000 Liters
Manufacturer	Seachem Laboratories, Inc.
Manufacturer	Seachem Laboratories, Inc.
Manufacturer Part Number	386
Model Number	386
Pet Type	Fish
Product Dimensions	2.44 x 2.44 x 4.81 inches; 10.4 ounces
Target Species	aquarium
UPC	000116038607 000116068307
Unit Count	1 Count

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