Table 2. Conditions in the experimental tanks at the end of the experiment.

	Low density	High density
	Mean ± SE	Mean ± SE	F1,38	P
Filamentous algae, g	69.50 ± 3.02	175.96 ± 4.98	333.65	<0.001
Number of zooplankton l−1	24.15 ± 2.82	79.00 ± 8.94	34.22	<0.001
Benthos, g	0.80 ± 0.28	2.91 ± 0.49	14.21	0.001

Notes.

ANOVA was used to analyse the data.