The effects of natural zeolite fed through feed and water on growth and performance of Oncorhynchus mykiss (Walbaum)

The influence of zeolite type “MINAZEL” was researched, as a feed additive for
trout, which is applied at 0.1% was studied as a feed additive for trout. The influence of zeolite, type
“Ambizel-V”, was also studied as a corrector of environmental conditions on growth
and performance of Rainbow trout (Oncorhynchus mykiss Walbaum).

Animals

The research was carried out on
9816 fish (aged 1+) divided
into two groups with 4908
fish in each pool for a period of
150 days.

Period

The experimental fish group
O-I was fed with pellets which
contained 1% zeolite and with
simultaneously implement
of “Ambizel-V” in the water
of the experimental pool.

It is consolidated that zeolite ( “MINAZEL” ), as a feed additive, had
a positive effect on all analysed morphometrical index of:

• Speed of fish growth
• Final weight (p < 0,01)
• Final length measures (p < 0,05)
• Growth increase (p < 0,01)

The stimulating effect of “MINAZEL” has been demonstrated
in the daily feed consumption (3.102%; 2.24%) and feed
conversion ratio VSM and nutrition (-13.62%; -14.78%).

Based on obtained research results it can be concluded that zeolite
“Ambizel-V” proved itself as reliable corrector of environmental
conditions in experimental pool, because it led to slight
decrease of numerical values of: total water hardness (8,54o dH);
nitrate (1,22 mg/l); ammonia NH₃ (0.0 mg/l).