Readings:

Time: 0800
Inside Temp: 40 deg F/ 4.5 deg C
Outside Temp: 10 deg F/ -12.2 deg C
Relative Humidity: 64%

Time: 1300
Inside Temp: 100 deg F / 37.8 deg C
Outside Temp: 59 deg F / 15 deg C
Relative Humidity: 60%

Time: 1800
Inside Temp: 80 deg F/ 26.7 deg C
Outside Temp: 54 deg F/ 12.2 deg C
Relative Humidity: 60%

Hab (taken at 1800)
Minimum Temp (& RH): 68.5 deg F/ 20.3 deg C
Maximum Temp (& RH): 75.9 deg F / 24.4 deg C
Note: from Channel 1 of the Oregon Scientific unit (located to the right of the southern window); remember to clear the memory every day by pressing "Memory" for 3 seconds. Note: this was likely not properly reset, which we will clear at 2400.

Today: Normal chores in the GreenHab were performed, although we were mainly concentrating on the loss of the generator problem. As power went out, the fan and aerators stopped (and the battery to the aerator pump eventually ran down). Greg D. plugged the aeration pump into the solar inverter to keep the Greenhab bubbling throughout the power problem. It did get quite hot midday as the fans were off and the door cracked for the power cord to the solar panel, but things went back to normal once Hab power was restored.

Greg D. turned on recycle pump for 5 minutes around 1200 for Peter's gravel experiment. However, in the power chaos, it was accidentally left on after the generator power was restored. As a result, Tank 2 over filled, and Tank 4 was depleted by more that half. Once we noticed, we turned off the recirculation pump. At first Tank 4 was being refilled by the system's natural over flow, but that has stopped. Tomorrow, Gus and Kathleen will evaluate what should be done about this. (Note from Crew 27: Peter's soil experiment setup. This water flows through the rock area and into Tank1 to remove algae from the top of the tank. Close valve after use to avoid water siphoning back to Tank 4. As Crew 27 set this up on their last day, we will have to see if it causes any problems. The main anticipated problem is that the small volume will make the water in the gravel bed prone to overheating, so turning on the recycle pump to flush it with colder water is important. Currently there are two water lettuces in there).

Gus installed the four-channel Hobo temperature datalogger in the north GreenHab, and downloaded and reset the one channel unit on the North outside wall.

Note: due to the power crisis, we learned quickly which items were powered by solar vs. Hab power, and throughout the day, the new detailed electrical diagram from Crew 27 was very helpful!

Open Issues:
Same, no action taken

• TST Float Switch: Crew 27 found the silver float switch, engineering will do this in the coming days, per instructions.
  
  
• Tacking down loose wires:
  Will be done in the coming days.
  
  
• Yellow Laptop as part of HOBO logger system:
  Status: The yellow laptop hab computer has some port malfunction which is preventing the HOBO download. During the HOBO testing, the baud rates were synchronized and correct port selected. The manual suggests that it might have been due to another program on the computer interfering with the Boxcar 4.3 program; Gus will evaluate it in the coming days.
  
  Treatment system appears not to be removing nitrate:
  We are currently evaluating Crew 27's assessment and proposed action for this issue (see report of 4/10)
  
  
• Trickling Filter Covers: based on Crew 27's suggestion, in the coming days, we will move green screen back temporarily with poles. Then remove black covers. Put the black trash bag covers over a frame (either pipes or wood), to lift the covers by 1-3" above the top of the tanks.
  
  
• Intermediate Plant screen for Tank #4:
  Based on Crew 27's suggestion, in the coming days, we will put in a vertical screen to prevent plants from floating underneath the back cover. Create a horizontal wood bar to bridge the width of the tank. Then tack a screen to the board and have it weighted to fall below the water surface. Then tack a black trash bag to the board and have it drop over the back of the tank.

Tank 3 Azolla & Lemna Visual Report

Image Taken from approx. 10cm above surface