Effect of Phosphate on Pond Water Community

In your lab notebook: 
	Entered in Table of Contents		2
	Descriptive Title			2
	Objectives				4
	Procedure				8
	Observations				20
	Summary				10

Objectives
1)	Set up a range of values for an independent variable.
2)	Determine a practical dependent variable for assessing pond water plankton.
3)	Contrast plant and animal cells.

Procedure
1)	Set up 4 plastic tanks each containing 1.5 liters of spring water and 0.5 l pond water. 
2)	Label them 0 ppm, 1 ppm, 2 ppm and 3 ppm NaH2PO4
3)	Prepare 1000 mg/l stock solution of NaH2PO4
4)	Calculate amounts of stock solution to add to each tank, if any. Add it.
5)	Set up 2 x 40 watt grow lights.
6)	Set up aerator on 4-way valve with identical air stones. Regulate flow for equal aeration.
7)	Observe periodically. Add spring water, if necessary.
8)	Sample and devise dependent variable.

Observations
1)	Record visual observations every few days.
2)	Record microscopic observations.

Summary
1)	Summarize at end
2)	Propose alterations/improvements to experimental design