For your Pool $3 Aquarius Liquid Pool 5% Algaecide is a preventive maintenance formula. Destroys algae formation Size: 3.78 L (1 US gal) $6.50 locally $3 Purox Chlorinating Liquid can be used as a shock treatment and for daily disinfection and purification. Ready to use Size: 5 L $7 locally $5 for both. Almost unused. Now the pool is gone.