Biotopol water purifier

Very good - works fine.

Great product. Made for Betta fish. Makes water changes so easy. No measuring, just add 2 drops per litre of water. Contains tropical almond extract which helps protect my fish.

Been using this to add to tap water that goes into the aquarium for several months. Seems to treat it just right, the measurements of tank water are always within my preferred parameters. Recommended additive.

Works well, the lid is nice measuring cup, although it is loose so make sure you tighten it up otherwise you'll see a spill

it does what it say's on the bottle very good quality

The best.

Arrived early well packaged and perfect for my shrimp they are looking better already :)

I use this all the time when adding tap water. It strips out the copper and keeps the water safe. Great product.