Can this be diluted with rodi water?

I know of several reef keeper who dilute with rodi water when using smaller doses, although I would contact Red Sea for the right mixture

I am running vinegar for nitrate reduction. How long do I need to stop the vinegar before I start this??

Suggest you call Red Sea. Their customer service with this product is helpful. Alternatively, you can also send an email. I've used both methods in successfully communicating with them.

Does this take longer for large tanks? I have 150 gallon s with a 68 gallon sump.

tank size does not matter I have 180, and I dose it with a dosser which is the best way to reduce nitrates, this stuff is excellent....it will take a while for the bacteria to form (should not be more than a month) , you will notice first a white film on your glass, once that starts the bacteria is growing and the white will disappear, the fish and snails love the bacteria. Again it needs to be done daily and your nitrates can be either gone, or reduced down to nothing if you prefer to have just a small amount. Again a dosser is the best method Jaebo cheap and works well under 60.00 Hope this helps

Can this be used in a freshwater aquarium?

It is suggested to use for salt water aquarium

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RED SEA FISH PHARM LTD. No3 Po4 - x Nitrate & Phosphate Reducer 1 Liter

RED SEA FISH PHARM LTD. No3 Po4 - x Nitrate & Phosphate Reducer 1 Liter

Product ID: 76550057

Details

Brand
Red Sea
Item Form
Liquid
Item Weight
1 Pounds
Liquid Volume
1000
Number of Packs
1

🌈Enhances coral color & growth

🦠Advanced bacterial support

⚖️Precise nutrient control

Description

🌊 Master your reef’s nutrient game with precision and vibrant results!

CORAL GROWTH BOOSTER - Promotes natural coral coloration and growth by preventing nutrient shock and starvation.
USER FRIENDLY DOSING - Includes measuring cup for accurate, gradual dosing to avoid harmful fluctuations.
MULTI STAGE CARBON COMPLEX - Supports diverse beneficial bacteria for complete nutrient reduction and ecosystem stability.
PRECISION NUTRIENT BALANCE - Maintains optimal nitrate & phosphate levels to protect coral health and vibrancy.
COMPATIBLE WITH REEF SYSTEMS - Works seamlessly with protein skimmers and Red Sea test kits for professional-grade aquarium care.

RED SEA FISH PHARM LTD. No3 Po4 - x is a 1-liter liquid formula designed to precisely reduce nitrates and phosphates in reef aquariums. Utilizing a unique multi-carbon complex, it supports beneficial bacteria that convert harmful nutrients into harmless nitrogen gas while promoting coral growth and vivid coloration. The product ensures gradual nutrient adjustments to protect delicate coral symbionts and includes a dosing cup for easy, accurate application. Ideal for professional reef keepers seeking stable, thriving aquatic ecosystems.

Specifications

ASIN	B004FUEAEI
Best Sellers Rank	#63,634 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,354 in Water Treatments
Brand Name	Red Sea
Customer Reviews	4.5 4.5 out of 5 stars (809)
Global Trade Identification Number	00730773222049
Item Form	Liquid
Item Weight	1 Pounds
Liquid Volume	1000 Millilitres
Manufacturer	RED SEA FISH PHARM LTD.
Manufacturer Part Number	306050
Model Number	306050
Number Of Items	1
Number of Packs	1
Pet Type	Fish
Target Species	Fish
UPC	730773222049
Unit Count	1000.0 Milliliters

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