Tank won't cycle
I've had a Red Eared Slider for about 10 years in a 120 gallon aquarium. Late last year my filter died and the tank was without a filter for about a week. I got a Fluval FX6 in early January and set it up in order if coarse pads, medium-fine pad, 1-2 liter of Seachem Matrix, 500ml of Seachem Matrix Carbon, 1 liter Seachem Zeolite, and 2 packets of Purigen. Each media should have enough to treat 200gallons of water.
When I first got the filter set up I managed to cycle it and the water turned very clear, so I took the Zeolite out in February and it slowly got worse again. I put more Zeolite and fresh carbon and purigen back in about a week ago and now the entire tank has crashed and looks like the filter isn't even running. I've been dosing with Seachem Safe and API ammo lock just to keep the ammonia from hurting my turtle or her goldfish. It has only looked good for about a week since getting this filter and I don't know what I'm doing wrong and why I can't get it to cycle again