Although many dive operators are keen to the needs of underwater photographers, the reality of having such luxuries as a fresh water rinse tank on some dive boats is still just a bit too much to ask. Other boats might have more photographers than room to accommodate the expensive toys they bring with them, and the risk of rinse tank floods due to too many cameras getting jerked around in one trash can is just too high.

A great solution is to bring your own! Although it sounds like a hassle, it is common to see divers, especially on day trips, bring their own portable rolling or collapsible cooler for their personal use as a rinse tank.

These coolers come in all sizes, but if you've got a housing with strobes you're going to need at least a 52-60 can cooler. The cost is about $35-$40. The coolers with wheels can also serve as your carrying case because they are pretty well padded.

Before you run out to your local camping supply or sporting goods store, make sure you consider that not all coolers may be suited for this purpose. I shopped around and found that a company called California Innovations has the most sturdy coolers. The collapsible coolers (without wheels) work best if space is an issue because it folds flat and you can toss it in your dive bag when traveling. They are portable and lightweight enough that you might even consider taking it on the road when in doubt about the facilities you'll find at your favorite tropical destination. The inside waterproof liner zips out for easy drying.

The Sierra collapsible cooler didn't do well when full of water.

The rolling collapsible cooler weighs a bit more and is more bulky, but works well if you're on a day boat, especially if you can use it to also transport your gear to the boat. Filling the cooler before bringing it aboard is also difficult since it will be heavy and unstable when full of water. Its easier to bring it empty and fill it on the boat.

Also note that these coolers are not designed for this, and some collapsible models will do exactly that... COLLAPSE! The Sierra collapsible rolling cooler I bought at REI was a little bit cheaper at $29, but had a soft bottom that would not support the weight of the cooler filled with water.

Hard coolers can also be used, but take up more valuable deck space and aren't as flexible for travel.

Several last comments:

• When shopping for a cooler, look for plastic and rubber wheels and parts instead of metal that will rust. Also look for a sturdy bottom that will hold the weight of the water.
• Fill up your cooler before the boat leaves the dock. The boat operator may not appreciate your use of so much fresh water once you leave port.
• When on the boat try to tuck your filled cooler away from the dive gear where it won't be kicked, stepped on or mistaken for a chair. The soft sides will not protect the gear inside from an off-balance diver.
• Let other divers know that your rinse tank is not for masks. Put a big note on the top lid if necessary. Chances are someone will find it and help themselves to your stash of the fresh stuff.

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