Dec 14th- 101's- Adjusting ammonia, making rafts

Aquaponics group-

Traced net cups onto foam.

Fabricated rafts using pink extruded polystyrene foam( XPS) which was much less friable than the white expanded polystyrene foam( EPS). They used a combination of a hot-wire cutter demonstrated by Dr. T and a knife to cut the foam. The hot wire cutter was very satisfying to use.

See http://insulfoam.com/insulation-comparisons/ for more on types of rigid foam insulation.

The Aquaponics group also added some ammonia to their system to begin cycling it:

Bikes Group-

The bikes group glued a cross piece onto the bike stand. They also experimented with neopixel lights which may get added to the bike:

Plants Group-

 Gave out samples of sprouts, which were tasty.