Hello! I have a 125 gallon aquarium and I dont believe its cycled correctly! Ive had it set up for about 9 months now. I have a 20 inch RTC in it. The water turns a greenish cloudy after water changes. I just did a 50% water change and tested amonnia and the level is high! My nitrates however are low! Why does this amonnia rise? Is it due to (improper cycling)? Is there anyyway to correst this? I have a eheim 2217 along with a Cascade 1000 and 2 penguin 350's Thanks.