Flipper Edge (Max) 2 in 1 Floating Magnetic Aquarium Algae Cleaner wavemaker As long as the aluminum

As long as the aluminum pouch  is closed

you will notice the color change of the Ultra-Phos from white to yellow and the much clearer water in the aquarium

Dechlorinators are also strong reducing substances

Neo fertilizer and essence are used

PF-800 has 1" bulkhead

Flipper Edge (Max) 2 in 1 Floating Magnetic Aquarium Algae Cleaner wavemaker As long as the aluminumGive Yourself The Edge The Most Advanced Handheld Aquarium Cleaner Ever Made! FLOAT. FL! P. SCRUB. & SCRAPE. Now with TWICE the cleaning power! FL! PPER Aquarium Products' patented 2 in 1 magnetic aquarium cleaner, now with dual blades, FL! PS from Scrubber to Scraper simply by rotating its handle. Complete aquarium cleaning without ever getting your hands wet! A "must have" cleaning tool for advanced aquarium hobbyists and maintenance professionals!