Here is the cheapest, and what I use for the occasional Ca+ boost...
Go to your local Pool & Spa dealer and ask for Calcium Chloride... for around $15 you will get as much as you need for years... and it is the identical chemical and physical composition as Kent Turbo Calcium or the old ESV, (now SeaChem???), Calcium Chloride. Dose the same as you would the Kent product... and before people flame me... I have done my research on this... and pretty much ALL Calcium Chloride is composed of 77 - 80% Calcium Chloride & the rest moisture by weight... INCLUDING Kent.
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135G Mixed Reef. Bullet 2, 25 gal refugium, 2 X250W MH + 4X 96W PC\'s, DIY Calcium Reactor, Coralife 1/6 HP Chiller, Phosban, Tunze, 2 closed loops & SQWD\'s, Seios, Coralife 4 stage RO/DI & a bunch of other expensive gadgets... I may never retire, but I'm gonnahavahelluvanaquarium!
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