envii Aquarium Klear - Natural Bacteria Clears Green Water Treatment, Crystal Clear Fish Tank Gravel Cleaner, Prevents Growth of New Algae - 500ml Treats 4,000 litres

I have used many algae cleaning products for my tank that barely worked. So I saw this product and read the reviews was a little sceptical but purchased all the same. But wow I am amazed at how fast it worked I partially emptied my tank and added 7.5ml to refill water and wow was a little murky at first but now as you can see water is crystal clear and gravel is clean wow wow would highly recommend this product to anyone wanting fast acting aquarium cleaner pity can only give 5 +✨ ✨✨✨✨✨ great price, easy to use excellent performance

Before choosing this product I had looked at plenty of others & thought they all say that they do this & do that. So I took a punt on this one, as they say the proof of the pudding etc (I do not recommend anybody trying to consume this product as it won't end well!)After a week, my aquarium always used to get a big build up of algae on the live plants, ornaments, air brick & filter as well as on the glass, which was due to its location & getting direct sunlight through 2 Velux windows (aquarium can't be moved elsewhere out of sunlight due to having limited space).I half emptied the aquarium l, cleaned plants etc but not the glass & refilled it & added 10ml as directed.After a week the results were astounding!! No return build up of algae on anything in the aquarium & after a 2 week of treatment, the algae has not returned! I thoroughly recommend this product!I am using 10ml weekly & it contains according to the labelling, natural ingredients that do not harm the fish, pondlife or plants.I'm so glad I took a punt as I was apprehensive that I would work & have found out it doe so amazingly well!

I started using this product just over 20 days ago and there’s already a lot of improvement to my tank, obviously there are other factors affecting my improvements but this product really does help with my plant growth and fish health. You can see the pictures I attached, one of the tank 20 days ago and now, and the other photo is of my fish, he’s alive and good, very active, and also gaining colour (on his tail), he was completely clear on some parts of his tail previously. I am not sure if that’s just him maturing or this good bacteria helping him out as well. The only reason why I’m giving this 4 stars not 5, is because I originally bought it to help out with my algae issue, which hasn’t helped and it feels like my algae issue actually went worse...

Very highly recommended, it’s a miracle product. My aquarium was really quite bad, with green algae, as it is positioned by a window. I now keep the shutters closed to stop the sunlight getting to it and I treated it with 1 5ml application of this product and it is crystal clear.

As I read "Brandenvii Liquid volume 4000 Litres Item form Liquid" I believe I was buying 4000ml not 500ml. False information. That being said, I used 20ml in my 200+L tank and it cleared up within 2 hours, looks crystal clear. Been using interpet quick clear and it only made the water red.

great product works as expected from supplier reviews

This product works great to get raid of all the algae im your fish tank and also some other bad bacteria in the fish thank that can manifest on the glass expecially if your fish tank gets one sun rays or if u have live plans. I recommend this product.Algae control:Works fast.

Does what it says it does