Food

Equipment:
5-10 gallon container, smooth stone(slate etc.), strong light, air stone and fish food/aquarium plant fertilizer.

1. Set up:
Fill a container with old aquarium water and place under strong light.
Ideal temp 72-78°F for diatoms, green algae, bacteria and protozoans.
Colder=slower growth, warmer=more algae & (bad)cyanobacteria. 

2. Grow:
Add a tiny pinch of fish food or aquarium plant fertilizer and run an air stone.

3. Harvest:
After 7-14 days, move coated rocks into the aquarium. Replace them as fish clean them.

*Brown diatom-covered rocks are especially nutritious

Equipment:
1-5 gallon clear container, grow light or sunny location, aquarium plant fertilizer, dechlorinator, (optional air stone and air pump)

1. Fill a clear container with dechlorinated water. 70-78°F 

2. Add a tiny amount of aquarium plant fertilizer.

3. Place in strong sunlight or under a grow light.

4. Wait 1–3 weeks until the water turns green.

5. Use it to feed Daphnia, Moina & Rotifers.

*Keep two cultures as backup.

Equipment:
5–10 gallon container, dechlorinated water, Daphnia, Monina or Rotifers, air stone, light, and green water. *Fine-mesh plankton sieve for Rotifers.

1. Set up:
Fill a container with dechlorinated water and install airstone.
For Daphnia keep 65-75°F/Moina 75-86°F/Rotifers 72-80°F .

2. Add Daphnia, Moina or Rotifers:
Add starter culture purchased online or local fish store.

3. Feed:
Add small amounts of green water as needed. The water should stay lightly cloudy- not foul or opaque. 

4. Maintain:
Change 10-20% weekly and remove debris.

5. Harvest:
Net some every few days, leaving plenty to reproduce. *For tiny rotifers harvest with fine-mesh plankton sieve

*Keep two cultures as backup.

Equipment: 5–10 gallon container, dechlorinated water, fine-mesh net.

1. Set up:
Fill a container with water and place outdoors in a shaded area. 

2. Grow:
Leave uncovered so mosquitoes can lay eggs. Check daily for larvae.

3. Harvest:
Scoop larvae with a fine-mesh net and feed immediately. Harvest before they pupate into adults.

*generally considered low risk to harvest wild mosquito larvae

Equipment:
1-5 gallon clear container, dechlorinated water, a squeeze from an established tank filter sponge, baker's yeast, optional: air stone

1. Set up:
Fill conatiner with dechlorinated water (optional: install a gentle airstone.) Squeeze mature sponge filter into container. 72- 80°F

2. Feed:
Add a tiny pinch of baker's yeast.

3. Grow:
Keep at room temperature. Wait 2–5 days.

4. Harvest:
Add small amounts of culture water to fry tanks.