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Support Centre.

Frequently asked questions (FAQ).

You can find detailed information about our products from a variety of sources: manuals, brochures, videos and this website to name a few. We recommend always reading the manual before usage of the product. There you will find the most detailed information regarding the product. You can find all our manuals at

The retailer where you bought your products can help you the most with your products. They can offer you the best support, order spare parts and complete a service form if necessary.

You can find our outlets and dealers on the “Store Locator” page, depending on the product you are looking for and your location.

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Are you a retailer and interested in selling products from the Aquatic Wholesale Group? Then feel free to send us a message via our contact form: . We will contact you shortly afterwards.

Yes, our products are safe for normal aquarium shrimps. However, some shrimp species are so sensitive, that normal things like a big water change can already have a negative effect on the animals. Hence, we recommend building up the dosage slowly and to observe the shrimps well during this process. Our Cerpofor medications are however not safe for invertebrates like shrimps.

Yes, you can feed your fish when your fish have to want to eat: when they want to eat, feeding them is always good because it gives them energy and nutrients to recover from the disease. Of course, keeping a close look on the water quality is needed!

All tests are specifically designed for either fresh water or sea water. Only a few tests can be used in both, namely KH, iron, iodine, silicate, and nitrite. Nitrate and phosphate have a different range in fresh and sea water but they can also be exchanged.

It is better not to let your dog or cat drink from the pond when treating it. However, the fish live, breathe and drink the same water 24 hours a day, and they have absolutely no problem. Thus, it is not likely that it will cause any problems when a dog or cat drinks just a little bit of the pond water. However, as you will understand, we have never tested this and thus cannot guarantee it. Therefor we have to stress that we advise to prevent pet animals from drinking from the pond.

As our medications have a very limited effect on the performance of your filter and parasites can also live in the filter, we recommend letting the medications also run through the filter. Always keep a close look on the water quality!

When a treatment doesn’t have the desired effect, two things are important. First, did you perform the correct treatment: e.g. where there actually flukes present when you decided to treat with Lernex? If not, be sure that a correct diagnosis is made, preferentially by an experienced shop keeper or even better a veterinarian.  Second, when the diagnosis was however correct, we can never exclude the possibility of resistant parasites. Best is to seek specialised advice from a veterinarian which can evaluate your specific situation and prescribe a solid treatment.

No, the CO2-indicator only responds to CO2 gas, and FloraGrow Carbo is a CO2-replacer and not actual CO2 gas.

The carbonate (KH) and general hardness (GH) tests don’t use a colour card. These are so-called titration tests, which means that you add drops of reagent until the colour changes. The amount of drops you added, is equal to the hardness. So, if you add 6 drops of GH-2, the total hardness is 6 hardness degrees. You can watch how these test work at our KH Test video and GH Test video.

Yes, Algisin is safe for use on plants and fish. Algisin kills of course algae and as these algae life in the water, chemical legislation forces us to use the symbol ‘dangerous for the aquatic environment’, however in practice this is only true for the algae and not for fish and plants!

This turbidity is caused by minor precipitation of calcium. Reef water is high in calcium, in fact it is a bit over-saturated and thus easily precipitates a bit. It is not dangerous at all and generally disappears with a couple of days. It is seen more often, especially at high salinities. Hence, lowering the salinity a bit enhances the dissolving of the salt.

Yes, salt levels up to 0.3% (3 kg per 1000 ltr) are no problem. When the level is higher, you should lower the concentration by refreshing water.

There is basically no minimum temperature below which you cannot use medications. However, at low temperatures the parasites are less sensitive to medications. As parasites are cold blooded, they absorb substances less and slower, leading to a reduced effect of the medications. Hence it is always preferred to treat fish at higher temperatures of at least 10°C, and if possible, above 15°C. So, if you can wait until the water is warmer, this is always better.

However, you only treat fish with a medicine, when there is a serious problem. If this is the case, waiting is not always an option. In other words, the decision to treat or to wait is a difficult decision that you can only make.

Unfortunately, not all effects are known, so we advise not to combine products. Of some products, we know that combinations are dangerous so we warn for these combinations explicitly in the manual of these products.

The main difference is that the active ingredients in both products are different. In a normal pond with goldfish mixed with koi, Lernex is the first choice. In a specialised koi pond, Lernex-Pro is the best choice as this is effective against flukes which are resistant against most fluke-treatments.

No, Lernex-Pro is only effective against skin and gill flukes. For treating lice and anchor worms, you have to use Morenicol Lernex.

There are two possibilities. Explanation 1: Algadrex worked well but the algae keep floating through the water. Algadrex is a coagulant which means that it binds particles together. When floating algae are clogged into relatively large lumps, they cannot float anymore and thus sink to the bottom or come to the surface. In addition, a filter can filter out the clogged algae as opposed to individual algae which simply flow right through the filter. However, when the filter doesn’t remove the algae lumps due to ineffective filtration capacity, the algae lumps are still recirculated through the pond. It appears that nothing happened. Optimising filtration is the key in such a case, e.g. by installing fine filter foam or filter cotton.

Explanation 2: Algadrex cannot bind everything. This can be due to too many algae. Algadrex has a maximum binding capacity: when there are more algae than this binding capacity, a part of the algae is not bonded, ergo it appears that nothing happened.

In short, Algadrex worked well, but the effect in not (well) visible. Which of the two explanations is true for your pond, is hard to say. I would recommend you have a good look at the filtration and optimise where necessary. Next, you can repeat the treatment. Please check the KH again if it is still high enough, as Algadrex is an acidic product which needs a sufficiently high KH!

Our products are developed and, even more important, tested for use in ornamental ponds with fish. As you can understand, our products have not been tested in ponds where humans are swimming, and thus we don’t know the effect of our products on humans. That is the reason that we always take the standpoint that our products are not intended for swimming ponds and thus we always communicate that the use of our products in swimming ponds is strictly at your own risk.

On the other hand, it is logic that water containing our products, in which fish swim 24 hours a day, water which they literally drink and breath, that this water is not likely to be harmful for humans.

There is basically no minimum temperature below which you cannot use Algisin. However, at low temperatures the algae are less sensitive to Algisin: they absorb the active ingredient less and slower, leading to a reduced effect. Hence it is preferred to treat the pond at higher temperatures of at least 10°C.

The volume sign at the front is no dosage instruction but an indication about the package size you need for a certain pond volume. The true dosing prescription is given at the side and in the manual, namely 15 ml per 300 ltr, which should be added twice with 14 days in between. In other words, 15 ml/300 ltr = 500 ml per 10.000 ltr for treatment 1 and 15 ml/300 ltr = 500 ml per 10.000 ltr for treatment 2, so in total 2*500 ml for a pond of 10.000 ltr. And that is why it says on the front of a 1000 ml package “10.000 ltr”, although you dose 500 ml each time.