Hi to all i recently set up a 200l aquarium

which currently houses a pair of Heros Severums 6cm, a pleco 4cm, algae eater 8cm and a pakistani loach 7cm. The decor consists of two small pieces of bogwood and a lot of limestone rock which i collected localy and washed thouraly before using.
My prob is this: i am having a lot of debris in the water,like small dust particles but the water itself is clear and im sure its not a bacterial bloom. I assume its due to the decor,any advice on what i can do

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Also the male severum is attacking the female which is a little smaller, should i be concerned or do you think they will eventually pair up??
thanks to all in advance
