How much would ou need to use in a 90 litre tank...?

I would say between 1-2 thread in the cap. Each thread works out to 50L.

Im looking to actually encourage algae growth in my tank, will this help with that?

It depends. With few fast growing plants in the tank then Flourish will tend to encourage algae growth, sometimes very quickly. But it can also unbalance bacterial load in filters if over dosed so go carefully. You might also find that black hair algae grows quickly ... not always a good source of food for fish, snails or shrimps if that’s what you want algae for.

Hi. Is this safe to use in newly set up (4weeks) aquarium. Java ferns melting. Thanks

If is newly set up u need tank to go via cycling all plants at first melt before settling in. Keep eye on your tank. I would not add anything but if you really want should be OK

If I does 4ml for my 200 litre is that once a wk and is it necessary to Refrigerate it? Thanks

Depends on how many plants and fish you have, I have a lot of fast growing plants in my 250 litre tank along with slower growers such as anubias, so I add 2ml everyday. Daily is better than dosing 1-2 times per week...Analogy: would you rather be fed 1-2 times per week or daily? As for keeping in the fridge: Flourish contains nitrogen, phosphorus, vitamins and amino acids and can get contaminated by stuff in the air when opened which can cause bacteria, mould, or fungus to grow inside the bottle. Seachem recommends putting it in the fridge 3 months after opening, I put it mine in straight away. If you start to get a lot of algae growth just cut down on the dosing.

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Flourish Comprehensive Supplement, 250 ml

Product ID: 50963554

Details

Brand
Seachem
Item form
Liquid
Item weight
0.25 Kilograms
Liquid volume
250
Number of Packs
1

🌿Micro & trace elements boost

💧250 mL liquid formula

⚙️Precise dosing: 5 mL per 60 gallons

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Description

🌿 Elevate your aquarium’s green game with Seachem Flourish!

TRUSTED BY THOUSANDS - 4.6-star rating from over 9,300 aquatic plant enthusiasts
LONG LASTING STABLE - Refrigerate after 3 months to maintain peak potency
OPTIMIZED DOSING SYSTEM - Easy 5 mL capful dosing tailored for large aquariums up to 60 gallons
COMPLETE PLANT NUTRITION - Delivers essential micro and trace elements for vibrant aquatic growth
NITROGEN PHOSPHORUS FREE - Supports plant health without promoting algae bloom

Seachem Flourish is a 250 mL liquid supplement designed to provide comprehensive micro and trace nutrients essential for healthy aquatic plants. Free from nitrogen and phosphorus, it promotes lush growth without encouraging algae. Ideal for large tanks, it features precise dosing and a 3-year warranty, making it a top choice for serious aquarium hobbyists.

Specifications

ASIN	B000255QJS
Allergen Information	Drug-Free
Best Sellers Rank	8,377 in Pet Supplies ( See Top 100 in Pet Supplies ) 107 in Aquarium Water Treatments
Brand Name	Seachem
Country Of Origin	USA
Customer Reviews	4.6 4.6 out of 5 stars (9,396)
Global Trade Identification Number	00000116051606
Included Components	Plant conditioner
Item Form	Liquid
Item Type Name	Plant supplement
Item Weight	0.25 Kilograms
Liquid Volume	250 Millilitres
Manufacturer	Seachem
Manufacturer Part Number	075233
Model Number	001254
Pet Type	Fish
Product Warranty	3 years
Target Species	Aquatic Plants
UPC	000116051606
Unit Count	250.0 millilitre

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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