Hi! I have this really big tank, but I'm not really sure how many galleons you would call it, by its 4ft by 2ft. I was wondering, if I were to buy a really good filter, can I not do water changes at all? Because its really difficult scoopping 10+ buckets of water out every 2 weeks. Whats more there is so much dirt collected below the gravel, just disturbing the gravel a little and the tank immediately turns cloudy. I hope someone can help me with this problem! Thank you so much