Edit: bad auto correct! "awful" should read "self" 😨
Video was pretty awful explanatory. The cloudiness is a bacterial bloom which can happen in a new tank. The filamentous buildup might be some type of bacteria or could be fungal and it appears to be prematurely clogging up the filter. Since you are early into this, you could try one of the following. First you would do a big water change (50-75%) and:
1. A new cartridge. From a cycling standpoint you would be starting from scratch.
2. Really rinse and shake out the existing cartridge in old water to unclog it.
In either case, doing 50% weekly water changes will help. You could break it up into 2x weekly 25% WCs. Hopefully this will dilute whatever is fueling the not so beneficial bacterial growth.
If you have not already, a decent test kit (API FW
master) will help guide you through the cycling process. Good luck with this.
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