The high charge current produces a surface color, which corresponds to a state of charge of 70â80%, although the average SOC is just 45%. The high discharge current also forms a large gradient of the state of charge in the graphite anode, which is reflected in a black color. Due to this color we presume that the anode surface has a very low SOC.
The ongoing costs of a pool (electricity, maintenance, and repairs) can cost owners $3,000-$5,000 or more per year. In an effort to save money, many homeowners decide to tackle pool cleaning on their own.Using the monthly pool costs outlined above, that can work out to yearly savings of more than $1,000. Extremely dirty pools (so murky that you canât see the bottom on the deep end) might require a drain and clean service that runs $500 to $600 or more. 2  Pool acid washingârequired for the most stubborn pool stainsâcosts $200 to $300 in addition to the cost of a drain and clean.
1 On average, draining a pool is going to cost anywhere from $1 to $2 per 1,000 gallons. 2  This price is to drain and refill the pool. 3  For example, a 20,000 gallon pool could cost anywhere from $20 to $40.4  However, keep in mind that most water companies will have a delivery fee that is tacked on top of this. On average, 10 to 12 gallons will be drained per minute. 2  Once the pool is drained, itâs important that itâs refilled immediately. 3  A pool will be drained if the TDS (total dissolved solids) exceed 1,500 parts per million. 4  If it exceeds this number, it can be hard to balance the chemicals.