December 13, 2023 through January 8, 2024: Set Up & Pre-cycling
We gathered all the equipment, watched the TIC set-up YouTube videos, and tested each component to make sure we were good to go. So far so good!
We can't just add the trout eggs to the water. Using chemical tests, we monitored the nitrogen cycle in our tank. Food was introduced as well as bacteria. As the food breaks down, the ammonia builds up. Bacteria will break that down into nitrite and eventually nitrates. Ammonia and nitrites can be toxic to fish, so we had to get levels and water temp. adjusted prior to the eggs arriving. This takes about a month!
January 9, 2024: Egg Arrival
Rainbow Trout Eggs
Checking Egg Delivery
Transferring Eggs
Acclimating Eggs to Tank Water
Acclimating Eggs to Tank Water
Once acclimated, we added eggs to hatch baskets.
The tank is insulated to ensure 58-degree F water & keep eggs in darkness.
January 17, 2024: Egg Hatching
The eggs came in the egg stage. They have hatched over the long weekend into sac fry, or alevin. Appears that almost all the eggs have survived with only a few losses at this point!
At this point the alevin are feeding on the rest of the egg yolk. Once this is absorbed we will begin feeding them the supplied fish food. At this point they should begin swimming out of the box soon enough.
Students help test the water and check on the hatchlings.
January 22, 2024: Hatchlings Out of the Boxes!
Sac fry (alevin) swimming on the bottom of our tank
Lots of space to roam and get comfy!
As of now, not too many losses. Off to a great start!
Check out our tank so far...
Students taking water samples and testing for pH, ammonia, nitrite, and nitrate levels.
January 23, 2024: Students Taking A Look At Our New Friends
Out of roughly 200 eggs, we only had 17 not hatch, and only 2 early phase losses. The rest look healthy and ready to go!
January 25, 2024: First Feeding
Some #0 food was sprinkled on top of the water, while some was dumped below the water. This helps acclimate the young fish to eating food and finding it in their surroundings.
First Feeding - Using the #0 food provided, they recieve about 1/16 tsp 3-4 times a day.
January 26, 2024: Fish Care Continues
February 12, 2024: Quick Reaction Saves the Day
Due to some extra uneaten food, we had a sudden spike in poor water quality last week. There was quite the smell and a slight greenish tint to the water. After removing the gravel that traps excess junk, vacuuming the waste and uneaten food, and two water changes, we are back to normal. Water is clear again and within the acceptable parameters for trout. Thanks to all the student helpers involved in rescuing our fish! We have to watch the amount of food going in - lesson learned.
February 13, 2024: Size and Development Notes
We are noticing that there are 3 relatively distinct "zones" in the tank: top, middle, and bottom. The fish at the top seem to be larger. Students hypothesized that this is because they are the first to get the food and can eat as much as they want while those at the middle and lower zones are limited to what uneaten food falls past the upper area.