Seachem calculator

[MarineFlake]

Kinda cool if you use seachem products.

http://www.seachem.com/support/DoseCalculator_Reef/DoseCalculator.swf

 

[bshumake]

I got a better one at work. I lets you choose from a lot of the market additives and also the DIY ones! I really should have remembered this one sooner and gave it to "Mr Additive" aka Dr Jay

 

[bshumake]

Calculator
There is is!