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.
Hi Bernard, to test the phosphate level in your pool, you can use the Natural Chemistry Phosphate Test Kit. This easy to use kit will provide you with the phosphate level of your pool in PPB (Parts Per Billion). Ideally, phosphate levels should be as close to zero as possible, but levels under 100 PPB are okay.