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· Premium Member
5,770 Posts
If you go with EI, buy the dry ferts for your macros, and get the liquid for your micros. My 2 cents worth for your 40:

At water change, and again midweek:
1/4tsp KNO3 (for nitrates)
1/16tsp KH2PO4 (for phosphates)
1/8tsp K2SO4 (for potassium)

3 days a week when you do NOT add the above, add 5ml of micros (trace element mix like Flourish) to the tank. There's lots of places to get dry ferts - check out some of our sponsors.

Look at the stickies in this forum for more EI and PPS dosing and more info.

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