Table 1.

Summary of characteristics of the current system and our proposal.

Paper	[12]	[13]	[14]	[15]	[16]	[17]	[18]	[19]	[20]	[21]	Our Proposal
Communication technology:	ZigBee	ZigBee	ZigBee	N.I.	ZigBee	ZigBee	LR-WPAN	N.I.	ZigBee	N.I.	WiFi
Applied on:	Tanks	Tank	Tanks	Ponds	Ponds	Tanks	Ponds	N.I.	Tank	Ponds	Tanks
Considers the location of the sensor?					x						x
Develop their own sensors?											x
Store information?	x	x	x	x	x	x	x	x	x	x	x
Send alarm?	x	x		x		x	x	x		x	x
pH		x	x	x	x	x	x		x		x
Water level		x			x						x
Temperature	x	x	x	x	x	x	x	x	x	x	x
Pressure	x
Dissolved oxygen	x	x		x	x	x	x	x	x	x
Conductivity			x			x		x			x
Ammonia									x
Others											x
Fish monitoring											x
Total of monitored parameters	3	4	3	3	4	4	3	3	4	2	10