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JBL Silikat EX

by JBL
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SKU J62549

Special filter material to remove silicic acid from the aquarium water

  • Binds and removes silicate from fresh and saltwater aquariums and prevents diatoms: filter granulate for the use in aquarium filters
  • Use: fill in enclosed net bag, rinse under water, insert in respective filter
  • Clean and healthy water: permanent absorption of silicate
  • Suitable for fresh and saltwater
  • Contents: 1 pack special filter material, incl. net bag and clip

Clean and healthy water

Plant and food remains and metabolic substances lead to a deterioration of the quality of the water in the aquarium. Good water quality is necessary for healthy fish and plants. This can be achieved with various filters and filter materials. The filters suck in the aquarium water and remove the pollution and waste materials with the filter material from the water.

Fine filterung

SilikatEx removes silicate from fresh and saltwater aquariums. It removes unwanted diatom algae (brown coatings), which often occur after the adding of freshwater, from the main nutrients. Amongst others SilikatEx also removes phosphate and thus curbs the growth of other algae. The filter material creates biotope-like living conditions.


Can I use JBL SilicatEX in the drinking water of the bathing tubs, too? Does this material release any substances into the water?? Could these be harmful to my lizards?

The raw ingredient in SilicatEx is normally used to remove arsenic from drinking water on a large scale in waterworks. Therefore, it can be assumed that there is no risk in this respect.

How long does JBL SilicatEx keep for?

JBL SilicatEx has an unlimited storage life in dry conditions.

What can be done about smear algae in saltwater?

There are two sorts of brown films in saltwater aquariums:

On the one hand it could be diatoms, which disappear on their own after a short time. In stubborn cases (a lot of silicic acid in the source water) there are two possible remedies: the use of JBL SilicatEx or the application of the synthetic resin MP 600, a strong basic ion exchanger. A mixed bed filter can also remove silicic acid from the source water. Reverse osmosis systems only help to a limited extent.

On the other hand it could be smear algae. Smear algae control needs quite a few words of explanation. Firstly: How can we distinguish between diatoms and smear algae?

A “feeling test” shows simply the difference: Diatoms feel rough, smeary and soapy, whereas smear algae feel soft, smeary and soapy.

The cause of smear algae is mostly poor water quality, which can’t be measured with a nitrate and phosphate test. An ORP measurement can be very useful here. The ORP measurement is a continuous measurement, which informs about the tendency in water quality. Rising ORP values show an improvement, dropping ORP values show a deterioration of the quality.

Example: An aquarium is not yet equipped with a flow pump. An ORP measuring indicates a value of 200 mV. The use of a flow pump creates water movement which whirls up and eliminates “dead zones” behind the aquarium decoration. The ORP value drops for a short time (whirled up mulm) and stabilizes afterwards at a higher level than before (the dead zones have disappeared). An improvement of water quality has been effected (with fewer reductive processes in the water). When additional flow pumps are used, their optimal positions can be determined by means of ORP measurements. The same can be done for the optimization of the filter positioning and with the deposition of silt at the bottom. These both influence the ORP value, but can’t directly be measured with commercial water tests.

If you raise the ORP value by about 150 – 200 mV, the smear algae will most probably disappear. The idea is to try out changes in the aquarium, evaluate the result with the ORP value, keep changing things until you reach the desired result.

The silicate concentration does not decrease after JBL SilikatEx is used. The Silicate Test always shows a deep-blue to black colouration, which indicates more than 6 mg/l of silicate.

A reading of > 6 mg/l with the silicate test means that there are more than 6 mg/l of silicate in the water. It is not possible to check how many more silicates are present. There may be 10, 50 or even more mg/l of silicates. There are more than 40 mg/l in tap waters in many regions today. The respective water supplier can provide more detailed information or you can dilute the water to be measured with silicate-free water e.g. water that has been distilled twice prior to measuring. In the event that osmosis water is supposed to be used, its silicate content should also be measured. With 40 mg/l of silicates in the starting water JBL Osmose 120 is able to achieve a permeate with 0.4 – 1.2 mg/l of silicate.

Therefore, with silicate values this high, the lowering effect of JBL SilikatEx can only be checked by corresponding dilution of the water to be measured.

500 g JBL SilikatEx binds 5000 mg/l silicate from the water.

Sample calculation:

100 l tank with 50 mg/l of silicate in the tap water:

100 l x 50 mg/l = 5,000 mg of silicate.

Therefore, one JBL SilikatEX manages to bind silicate from 100 l of water with a slow flow rate.