Planted Tank Enthusiast
Join Date: Jul 2014
Location: California for school, Arkansas for home
Not sure if this'll help, but here goes. I do sporadic water changes. If the shrimp aren't dying, then I need not do a water change, but I aim for bimonthly ones anyways. I drain 5 gallons out of the shrimp tank, and then add the concentrated pH/gH/kH solution that I need (approximately 1/16 teaspoon Seachem Acid Buffer, 1 teaspoon Seachem Alkaline Buffer, and 1/4 tablespoon Seachem equilibrium all in one gallon), then add the RO/DI water in. Not all at once, but a small stream produced by slowly opening the cap and propping the container on its side over the tank. It works for my cherry shrimp colony with a single red rilli and single black rilli. I just found eggs, so that means they're breeding as well.
As for your actual question, the nutrients will get diluted. Just make sure to dose after the water change so you don't waste the ferts.