Join Date: Apr 2016
Location: Central New York, USA
You're in a tough spot. 160ppm nitrates is way high. Experts feel (at least for fish) we should keep nitrates <=20ppm....the lower the better.
I've never done EI dosing so am unsure how it affects NO3, but it probably increases it some. I tried Purigen for a time and although it turned brown, I never had it lower tank nitrates. I became unconvinced that it traps organics before they break down!
In any case, with 20ppm NO3 in your source water you will find it nearly impossible to get/keep nitrates low enough with water changes....even with excellent filter and tank maintenance. I think you should explore an alternate water source or a means of filtering nitrates from your water. Consider API Nitra-Zorb, an anion resin that adsorbs ammonia and nitrates and is rechargeable many times with salt water. Note: place pouches following fine filtration as detritus coating the pellets can reduce the use life. It is uncertain if the product can be reclaimed with bleach/water like Purigen.
I would likely stop EI until tank nitrates were under control.
And obviously you need to do all the other things to get/keep tank nitrates low. Don't overlook fast growing floating plants that will convert ammonia into plant tissue.
(Note: I use Nitra-Zorb in a now discontinued API Tap Water Filter to pre-filter nitrates from my well water for water changes - works great! I get about 250g before I need to recharge with salt water. I use ordinary non-iodized table salt, although aquarium salt can also be used).
Tank On, Mike-
60g Marineland Community, Finnex Planted+ 24/7, Silica (pool filter) sand.
10g, 29g, & 37g fry grow out tanks, 110g stock tank.
What came first, the chicken or the egg. It was the egg, but not the egg of a chicken.
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