I used to be like that switching monthly. Then i got more tanks.. Then i moved and downsized, now i have one 125 and i have other hobbies breaking my bank so im cool with my tank being as is...

I am always itching to improve what I have. Sometimes that means new equipment (lights, filters, DIY stuff) and sometimes that means different gravel or plants. Sometimes that means different fish.
I have found that I am a dreamer and if I don't have some grand plan on what my tanks are going to be one day, I am not as interested in the hobby.
I'll admit that I couldn't find my way through the valley of the shadow of death that is the OP, but I'll address the subject line's question.
I like to do big water changes and often. I've found my GATF is happier with pristine water. I normally do a 50% every 3-4 days.
THAT is EXACTLY what I thought this thread was about, until reading it all.