# Formulas and Conversions

### There are 6 commonly used measures of volume

A volume of 1 metre x 1 metre x 1 metre 1 cubic metre

Since 1 metre = 100 centimetres, then 1 cubic metre = 100 x 100 x 100 cubic centimeters or 1 million cc’s

Since 1 cc = 1 millilitre (one thousandth of a litre) , then

• 1 cubic metre = 1000 litres = 35.3 cubic feet = 264 gallons (US) = 222 gallons (Imperial)
• 1 cubic foot = 28317 cc’s = 28.32 litres = 7.5 gallons (US) = 6.29 Gallons (Imperial)
• 1 gallon (Imperial) = 1.2 gallons (US) = 4.546 litres = 0.159 cubic feet = 0.0045 cu metres
• 1 gallon (US) = 0.8327 gallons (Imperial) = 3.785 litres = 0.1337 cubic feet = 128 fluid ounces = 0.0038 cu metres = 0.0038 cubic metres
• 1 fluid ounce = 29.57 cc = 2 tablespoonfuls = 6 teaspoonfuls
• 1 litre = 0.2642 gallons (US) = 0.22 gallons (Imperial) = 0.0353 cubic feet = 33.8 fl. oz.
• 1 drop = 0.1 cc; 1 cc = 16 drops; 1 teaspoonful = 50 drops = 5 cc

A typical swimming pool of 400 cu metres = 105,650 gallons (US) = 88,000 gals (Imp)

A typical swimming pool of 20,000 gallons (US) = 76 cubic metres

A typical swimming pool of 100,000 gallons (US) = 380 cubic metres

### Problem of Pure Water Conductivity:

Typically well and city tap waters have very low electrical conductivity of 200 to 500 micro-Siemens (uS) and are unable to pass the high currents of 1 amp or more needed for fast charging of large ponds and pools over 20,000 gallons (90 cu. m).

According to Ohm’s Law, Current = Voltage x Conductivity. Therefore to increase current, we need to add salt to the water or increase the applied voltage and/or heat the water.

We have raised our voltage from 12v (allows 0.1 amp) to 24v (allows 0.3 amp) and now to 48 volts which allows 0.6 (600 mA) amps to flow in pure city water at 20 degrees C.

We can provide options of 100, 200, or 300 volts and are able to obtain up to 10 amps in unsalted water.

Even adding salt to make the water 800 uS will give only 0.8 amps at 24 volts and 1.8 amps at 48v; 1200 uS will give 1.4 amps at 24 v and 2.6 amps at 48v; 2500 uS will give 1.6amps at 24v and 3.2 amps at 48v.

We therefore recommend a minimum of 800 uS conductivity by adding salt.

Where fish are present we would recommend natural rock or sea salt.

To obtain 1 ppm of salinity in 100 cu.m (100,000 litres) there would need to be added 100 gms (0.1 kg) of salt.