You can let it slide, especially since they are heavily planted. If you can test the water and they're cycled and planted heavy enough to be reading 0, 0, 0...just top them off if you're hurting bad.
And I agree, talk to your husband.
You may have to start trimming down on the more difficult tanks, sadly, but there are some things that can help delay this. Do you have a python for the larger tanks?