If the Form 990-T is filed on or before the due date of the return, the SOL begins. to run on the due date of the return, which is on or before the 15th day of the. fourth month following the close of the taxable year of the trust, which for a. qualified plan is the plan year.
Phosphate is a vital plant nutrient and the presence in swimming pool water, even at low concentrations, can cause accelerated algae growth in poorly maintained pools. Pools, that are properly maintained, usually do not have unexpected difficulty controlling algae, even in the presence of phosphates.
Another cause of high pH is the use of pool chemicals in incorrect amounts. Chemicals like sodium carbonate, used to raise pH when the pool is overly acidic, can be overused, causing a high pH. Calcium hypochlorite, an alkaline substance used to add more chlorine to the pool, also can cause a high pH. When a pool has high pH, it can be lowered through the addition of chemicals like muriatic acid or sodium bisulphate.