. . . and not a drop to drink!

The first item to be addressed on our acre of lava was a 15,000 gallon water catchment tank full of algae. The water in the tank was full to the brim, but the color of the green on the sides of this blog! In the toilets, it was almost black.

I found a young man in the area who worked on water tanks He took one look inside and vowed he’d never seen a tank so green, and definitely didn’t encourage me to use it! Over the next few weeks, he “shocked” the water several times, killed off all the algae, then vacuumed it out. He went through this process several times, before he felt it was useable.

Notice, I didn’t say “drinkable!” Even after a couple of years, I still buy my drinking water, although I’m sure it is fine now. I plan to put in an ultra violet filter that will make it safe for drinking.

The cover on the tank was old, covered in bird sh*t, and a dead bird was in the bottom of the tank. As soon as the water started to look clear, I bought a new cover (see photo above). This keeps the sun off the water and protects it from any outside debris.

The gutters are designed to catch all our rain and pipe it to the tank. We added a gutter on the shed in order to maximize the water we caught. Every drop counts around here! There is a net bag at the end of each pipe to catch leaves and trash before the water enters the tank.

There is a pump under the house that then pumps the tank water back to the house for use. We installed two filters – one to take out the chlorine and the other to catch anything else that might have gotten through. These are replaced about every six weeks, or you end up with the pump clogged and not working.

While suburbanites make an effort to be “green” by buying 50-gallon rain barrels, that wouldn’t go far here on the south end of the Big Island of Hawai`i. We live off catchment water. We love the rainy season, and a drought can hit us hard. By late summer, I may have to buy 4,000 gallons ($150) from a water truck that gets it from the county. They will pump it in, getting us through until the first rain, but it messes up the chemical balance in the tank.

There is a delicate balance to maintain the water. The pH and chlorine levels need to be just right, so I’m constantly checking, then adding whatever is necessary to keep it right. I rigged a “Mark Twain” kind of rope so I can measure the depth. “Conservation” is the constant word of the day. But I lived on my 37′ sailboat ( so I already knew about conserving water.

There were so many things I wanted to do – plant a garden, make curtains, buy a stove – but our basic need for water came first. I’m pleased with what has been accomplished.

For more “official” information about all this, see the UH Cooperative Extension Service. (

Aloha until next week!


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