DLS

DLS (double-layered spiral): A material that is made by rolling up a polyester pad and plastic wire mesh. It is used in both biological and mechanical filters.
Dog Salmon: Nickname for the Chum Salmon. See also Chum Salmon.

This was tested, and for freshwater systems, trickle filters just don't cut it, it takes a lot more than water gently flowing over some DLS to cause ammonia loss to the air, especially when the ammonia is almost 100% ammonium ions.

DLS DLS (double-layered spiral) is a material made by rolling up a polyester pad and plastic wire mesh. It is used in both biological and mechanical filters.

I even started out with a wet/dry DLS as the primary filter. That filter worked just fine for two years but then I grew tired of having to remove and clean the DLS pads every 3-6 months and the mess that created.

That is to say no DLS or Bio-Balls. Why ? I have mentioned that the advantage of the Dry section is that the bacteria's become quite effective when exposed to greater amounts of oxygen, and this is very true. Ironically they become too effective ! ...

Fortunately, when you have well oxygenated water flowing over suitable media (gravel, DLS, Bio Balls, etc. ), colonies of nitrifying bacteria begin to grow. The first type of these nitrifying bacteria are Nitrosomonas.

For your convenience, the parts needed for installation are included with the aquarium, allowing you to easily connect your SeaClear Aquarium to many brands of filters. A roll of DLS (Dual Layer Spiral) filter material is provided for the skimmer box ...

NO lumens per lamp = 2600 (Phillips F40D daylight, initial)
NO watts per lamp = 40 (ditto)
NO cost per lamp = ~$20 (from memory, DLS actinic day) ...

Includes an installation kit and a roll of DLS filter material which will trap waste before it enters the filter system. Also includes a full hood with fluorescent fixture (bulbs sold separately).

See also: Fish, Water, Filter, Aquarium, Marine