Penobscot County Soil & Water Conservation District

Trout FAQ 

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Frequently Asked Questions

Should I stock rainbows or brook trout?
In almost every farm pond in Maine, rainbows will grow faster, larger and survive longer than brook trout. However, brook trout are a native species, and IF&W may restrict certain customers to brook trout if they are located near brook trout habitats.
Can I stock small fish if there are big ones in my pond?
If the “big ones” are rainbows, there will be no problem, since big rainbows feed primarily on insects and invertebrates. If there are other larger fish in your pond, especially brook trout, stock trout that are at least half the length of the larger fish.
Should I “adapt” the trout to my pond for a few hours in their oxygen bags? No. Adaptation requires several weeks, and we schedule our delivery at the time of year when the hatchery and farm pond conditions are similar. Simply remove the wire closure, and gently pour the trout into your pond.
Should I feed my fish?
In ponds at least 6 months old, there will probably be plenty of natural food for your fish to eat, such as insect larvae, snails, worms, etc.. Supplemental feed is not necessary. Fish will grow faster with added feed, but overfeeding will cause decay on the bottom of your pond, and growth of plants and algae. These use the oxygen your fish need to survive.
How long will my fish live?
Trout can live up to five or six years. However, warm water, abundant food, and the resulting fast growth usually shorten their life span to three or four years.
Will the trout spawn in my pond?
They will probably try to spawn, but conditions must be just right. If the pond has an inlet, a shallow area lined with pea-sized gravel will help.
Stocking Guide
Surface Area of Pond Number of 4-5" Fish or Larger
¼ acre 50 Fish
½ acre 100 Fish
¾ acre 125 - 150 Fish
1 acre 150 - 250 Fish
     
 

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