Generally, reef blowers are used to clean yards, similar to real-life leaf blowers and shop vacuum cleaners. It uses a long black hose with a red suction head that has a switch on it to change between its blow and suction functions. It is connected to a dust bag which is white, has a filter, a cartridge filter, and attachments. The size of the dust bag varies and generally has incredible storing space and elasticity, able to vacuum up things much larger than the bag itself, ranging from the windows and nose of Squidward's house to the entire ocean. The suction and blowing force from the machine ranges from mild breezes to being able to fire large projectiles that can easily destroy a stone house.
So far there are two versions of the reef blower.
Version 1 of the Reef Blower is very large (about 1 1/2 times the size of SpongeBob) and appears to be difficult to use. It breaks down often but has incredible suction power, able to completely drain the ocean before exploding. The device also has an extremely long pull cord which allows SpongeBob to draw it across long distances. This version was seen in "Reef Blower" and The SpongeBob Movie: Sponge Out of Water.
Version 2 of the Reef Blower is smaller and more compact (about the size of a small backpack). The holding compartment is able to hold the nose of Squidward's house. This version was seen in "Squidville."
In the episode "Reef Blower," after Squidward clumsily kicks a shell off his lawn onto SpongeBob's property, SpongeBob takes notice of this and retrieves his reef blower from his garage to remove it from his lawn. However, none of his attempts work, only bringing the shell back and blowing sand into the air. As a result, SpongeBob decides to place the sand back into the dust bag and mess around with the machine by blowing it in Squidward's face and lunch and testing the elasticity of its pull cord, which sucks up the entire water of the ocean, then restoring it after the machine explodes.
It next appears in "Squidville," where, despite being designed to be used for yard work, SpongeBob and Patrick use it for more recreational uses like reef blower tag. Squidward later uses it for pranking purposes. So far, most squid folk look down upon using reef blowers in a childish manner, though Squidward becomes an exception.
It is able to vacuum the pineapple lines off of SpongeBob's house with no visible damage to it, as well as the door off of Squidward's house, comically leaving no hole for him to exit his house from where the door is. Other strange feats of the reef blower include the inflation of an unsuspecting squid's head, removing the eyes and noses off of two squids' faces then putting two sets of eyes on one squid and two noses on the other without any other visible harm on them, and propelling Squidward several hundred feet into the sky.
The only people seen using the reef blower are SpongeBob, Patrick, Squidward, and the groundskeeper of Tentacle Acres.