Plans for water storage in the Everglades are blooming like the toxic algae that polluted estuaries on Florida’s Atlantic and Gulf coasts last summer. Last August, Sen. Joe Negron (R), president-designate of Florida’s state senate, unveiled a $2.4- billion plan to purchase land south of Lake Okeechobee for a 60,000-acre reservoir to store 120 billion gallons of polluted lake water, which currently is discharged into the tide when the lake rises to a level that threatens the dike that encloses it. With the March 7 approach of Florida’s legislative session, Negron’s plan is facing increasingly stiff competition from a still-undefined reservoir to be built north of the lake under the Comprehensive Everglades Restoration Plan’s integrated delivery schedule.