When you put bagged activated carbon into water, there is a layer of something on the water: a layer of grease.

The reasons why there is a layer of oil on the water surface:

1. Grease produced by the remains of microorganisms or old waste, residual bait, organic matter, etc.

2. There are too many fish, and the fish excrement cannot be filtered by the filter cotton. The only way is to install an oil film processor; or to raise some tank-cleaning fish. 3. The filter material in the filter is too dirty and grease overflows.

Solution

: 1. Close the fish tank lid

. 2. Raising fish that feed on oil (fish that float on the water and eat dirt), such as black horses, black girls, black teapots, etc., can reduce the production of oil films.

3. Use an oil film processor to connect the water inlet of the filter to an oil separator and leave it open for filtration for a few days. The oil film enters the filter, is absorbed by the filter cotton in the filter material, and is decomposed by nitrifying bacteria. grease.

4. Add nitrifying bacteria 3 times as instructed; after 3 days, place a pack of granular activated carbon between the two layers of filter cotton. The water will be very clear after a week.

5. Replace the filter cotton, be careful not to buy poor quality filter cotton, and clean the dirt in the filter in time.

6. Use oil-absorbing paper to absorb the oil. You can place oil-absorbing paper at the diagonal corner of the water outlet (the oil film concentration area) to absorb the oil.