Amonia problems

[makana]

I can appreciate the complexity of of the hair algea problem and nitrate problem. But if I am doing water changes with amonia levels between 1 and 4 mg/L then the end result of that amonia is going to be nitrates. Essentially my bioload is overloaded without adding fish.

For what it is worth I don't smell amonia on the top floor of the house and after 24 hours a cup of ro/di water tests at 1. If its not coming from the litter box then where else would it be coming from?

I guess all that really matters is how can I stop the amonia from getting into my water change water? The garage is the only spot I have found where uncovered water does not increase in amonia but it is going to be too cold.