I follow instructions to the t and do know what ph,gh,and kh are, how to test for them, how they work, and how to lower and raise them. I like to think I'm a little knowledgeable in fish but definitely not an expert. I've done countless hours of research in my free time to make sure my fish and zoo full of animals in my house are happy and healthy but I do appreciate the concern for my buddies water parameters.Chris, with this bio load, this sounds impossible. What test kit are you using? If it's the API master test kit, are you following the nitrate test instructions to a "T"?
We do primarily change water to manage nitrates, but not doing a WC in almost a year, while topping up the tank level is going to mess with the water's KH and GH (among other things), that eventually you're going to have a pH crash that will do in the tank.
I'm another pothos keeper and have a big one in my 75g where I keep an adult oscar and green severum. My pothos is big and constantly growing with a huge root mass. I notice zero nitrate reduction with this plant in the tank. I keep my nitrate creep below 20ppm by doing a weekly fin-level water change on this tank.
This isn't the most recent pic of my pothos. It's got 4-5 large runners that hang 2-3 feet from the back of the tank that you can't see from the pic.
I figured as much, but just wanted to rule that out! I wasn't in any way trying to be a smart-azz. Over the years I've heard of similar claims and they're either not doing the test right, they're using test strips, or they never post back to back-up their claims.I follow instructions to the t and do know what ph,gh,and kh are, how to test for them, how they work, and how to lower and raise them. I like to think I'm a little knowledgeable in fish but definitely not an expert. I've done countless hours of research in my free time to make sure my fish and zoo full of animals in my house are happy and healthy but I do appreciate the concern for my buddies water parameters.