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#Aquaculture#Eight common water colors correspond to algae
1. Diatom water - good water
The water quality of this water color is more fat and live, and the algae in the water are diatoms, such as triangular brown finger algae, crescent-shaped algae, algae, small ring algae, etc., which are high-quality food for aquaculture animals. The breeding objects living in this water color are vigorous, the body color is smooth, the feeding digestion and absorption are good, the growth rate is fast, and it is the best water color for breeding. (There are many shrimp water bodies, few domestic fish breeding ponds, mostly small ring algae, suitable for crabs, shrimp, mussels and water bodies)
▲ Diatom water; small cyclic algae
2. Green algae water --- light green, emerald green
The water quality of this water color looks tender, the transparency is between 20-35cm, the algae in the water is green algae, and the common green algae are chlorella, gravis, chlamydia and so on. Green algae can absorb a large amount of nitrogen fertilizer in the water, purify the water quality, breeding animals grow fast in this environment, the body color is transparent.
▲ Green algae water; four-tailed graft algae; monocorangular disc star algae
3. Diasicolauconium water --- yellow-green
For the symbiosis of diatoms and green algae water color, people often say "green algae water is stable, diatom water is rich", and yellow-green water has both the advantages of diatom water and green algae water, the water color is stable, rich in nutrients, this kind of water color breeding aquatic animals have strong vitality, bright body color, and fast growth rate.
▲ Diasicolaus water; Fine crescent algae; Bileton algae
4. The --- of thick green water is average
The water quality of this water color looks more concentrated, more common in the late stage of breeding, the transparency is about 10cm, the algae in the water is mainly green algae, the water quality is fatter, but the live, refreshing, less suspended particles in the water, is conducive to slowing down the stress response of animals to the environment and climate change.
▲ Thick green water; sharp graft algae; double-shot disc star algae
5. Blue-green or dark green - cyanobacterial water
Cyanobacteria, green algae or naked algae in the water are multiplied in large quantities, and the water quality is thick and turbid, with a transparency of 20 cm; there is a small amount of green suspended fine dust on the surface of the water at the downwind. This is most likely to occur in aging pools and easily becomes "patina water". This water body can still survive, but it is necessary to regulate water quality, otherwise the water quality will age, a large number of algae will die and float on the surface, and the incidence of farmed animals will increase.
▲ Serococcus blooms; fibrillary algae blooms; spiral fishy algae
6. Naked algae blooms
Naked algae like to grow in small water bodies with abundant sunshine, rich organic matter, stationary and no flowing water, and the suitable temperature for reproduction is 20-35 °C, spanning the three seasons of spring, summer and autumn, especially in June, July, August and September. Blood-red naked algae blooms often gather on the surface of the water to form a red oil film, which mostly appear at the turn of spring and summer or the turn of summer and autumn, and are manifested as "sunny red, yin green, red and late green".
▲ Green naked algae bloom; dense cystic naked algae
7. Red turbidity: sauce red, black red
▲ Cryptoalgae water; nibble cryptoalgae
The main species is cryptoalgae, mainly ingestion cryptoalgae, mostly appear in the low temperature of December to March, this water color is due to management abnormalities, such as too much feed feeding, too much residual bait feces, resulting in an increase in solubility and suspended organic matter. The water is extremely eutrophicating, and the water quality and substrate are extremely aging. Excessive reproduction aggravates the late respiration of nocturnal algae, which can easily lead to lack of oxygen in ponds. Although cryptoalgae are algae that silver carp like to eat, which is a sign of pond fertilizer, living water and good water, there is a single species of algae, and weather mutations are prone to inverted algae.
8. Yellow turbidity: yellow, yellow mud color
(1) Mainly contains dinoflagellates, golden algae and other flagella. The organic matter that has accumulated in the pool for a long time is easy to produce this water color after bacterial decomposition. (2) Newly opened ponds, the bottom mud is not fertile, the species and number of algae are small, and the turbid state is murky. (3) The proportion of pond nesting is inappropriate, and too many carp are raised, resulting in large agitation at the bottom of the water, resulting in turbidity.
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