When you insert your camera or camcorder into the housing, you are also "inserting" fresh and usually moist air. If you then enter water that is slightly cooler then the air above is, this will cause the air inside the housing to cool as well and as cool air can carry less moisture, drops of condensation can appear on the front port of the camera
This can be alleviated by adding a drying agent into the housing (ewa-marine CD-5). Many of our housings have a special pouch for the CD-5 or just insert it next to the equipment. As the silica needs some time to act, give it about 10-15 minutes after closing the housing before entering the water.
The new CD5 is of a blue colour. Once saturated with moisture it turns red. CD5 can then be reactivated by drying in the sun (only on a dry atmosphere) or in an oven. This process can be repeated up to five times.
If you are into under water film or photography, you need ewa-marine's CD5!
Reviewed by 4 customers
Works great at keeping my equipment dry.
Ewa Marine Silica gel has helped me to remove any moisture and dew issues while I make my CCD imaging. It keeps mi sensor, internals and lenses clean and free of any moisture residues. I highly recommend it for anyone doing CCD imaging. This product turns pink when it needs to be dried again, then it will turn blue again to use for up to 5 times.
I used it for diving and snorkeling trips inside my underwater casing for 10 days in Caribbean. In some cases Iâ€™ve pulled camera out of the casing in middle of the diving trip on the boat and put it back in. Never had a problem, although I did use 2 pockets inside the casing.
Seems to be of better quality than what you get at Walgreens