JBL Clynol, 100 ml is a water clarifier for freshwater and marine aquariums from the German maker JBL. It clears the water naturally: fine natural mineral particles spread through the water and, thanks to their special surface structure, bind cloudiness, colourants, particles, heavy metals, ammonium, proteins and unpleasant odours. According to the manufacturer, the whole aquarium effectively becomes a giant filter, and cloudiness clears within 2–24 hours. It's suitable for tanks with fish, aquatic turtles and shrimp.
Where cloudiness comes from
White cloudiness in a new tank is usually a bacterial bloom before the biological balance settles. Grey cloudiness appears after adding substrate or moving decor. Yellow or brown water comes from driftwood, leaves and food remains. A bad smell and cloudiness in an established tank often point to overfeeding and an overloaded filter. More on setting up a tank in an aquarium for beginners: what to buy.
How Clynol works
The mineral particles attract suspended matter, colourants and dissolved unwanted substances, clump them together, and then it all settles or is caught by the filter. Clynol also binds heavy metals and ammonium, helping make the water safer for fish and invertebrates. It doesn't kill bacteria or radically change water chemistry — it works gently, using natural minerals.
Key specs
| Parameter | Value |
|---|---|
| Aquarium type | freshwater and marine |
| Inhabitants | fish, aquatic turtles, shrimp |
| Action | clears cloudiness, colour and odours; binds heavy metals and ammonium |
| Base | natural minerals |
| Dosage | 10 ml per 40 l per week |
| Results | within 2–24 hours |
| Volume | 100 ml |
Pros
- Fast results. Water clears within 2–24 hours.
- Natural minerals. Gentle action without harsh chemicals.
- Versatile. Fresh and salt water, turtles and shrimp.
- All-round action. Cloudiness, colour, odours, heavy metals and ammonium.
- Economical. 10 ml per 40 l per week.
- A trusted maker. JBL from Germany.
Cons
- Doesn't fix the cause. If cloudiness comes from overfeeding or an overloaded filter, it will come back.
- Loads the filter. Bound particles collect in it, so the filter will need rinsing.
- Unclear product page. The "serious cases" dose is the same as the normal one — check the label.
- No ingredient list. The specific minerals aren't named.
How to use it
The dose is 10 ml per 40 l of water per week; for a 60 l tank, for example, use 15 ml. Measure the product, dilute it in a little tank water and pour it into the filter outflow so it spreads quickly. Cloudiness should clear within 2–24 hours. A couple of days later, rinse the filter sponge in tank water, as bound particles collect there. If you're treating fish at the same time, check compatibility, as some products shouldn't be combined.
How to prevent cloudiness
Don't overfeed: food should be eaten within 2–3 minutes — more in aquarium fish food: how to feed. Change 20–30% of the water weekly and vacuum the substrate. In a new tank, add bacteria to establish the biological balance faster — for example, Rikka AKVA START. Owners of aquatic turtles, whose water gets dirty especially fast, will find red-eared sliders: care and feeding useful.
Who it suits
Owners of freshwater and marine aquariums, turtle tanks and shrimp tanks whose water has turned cloudy, discoloured or smelly. More products are in the fish medicines and water care section.
Verdict
JBL Clynol is a gentle mineral clarifier that makes water clear within 2–24 hours and binds colourants, odours, heavy metals and ammonium. It suits fresh and salt water, turtles and shrimp. But it's a helper, not a solution: the cause of the cloudiness — overfeeding, weak filtration or an uncycled tank — needs to be fixed separately.
FAQ
How much should I add?
10 ml per 40 l of water per week; 15 ml for 60 l.
How quickly will the cloudiness clear?
Within 2–24 hours.
Is it suitable for a marine tank?
Yes, for fresh and salt water.
Is it safe for shrimp?
Yes, the manufacturer says it's suitable for shrimp and turtles.
Does it bind ammonium?
Yes, as well as heavy metals, proteins and odours.
Should I clean the filter afterwards?
It's a good idea to rinse the sponge in tank water a couple of days later.
Why does the cloudiness come back?
Most likely the cause hasn't been fixed: overfeeding, weak filtration or an uncycled tank.
