Hi welcome here,

1st this filter is not suitable for planted tank. with the water flow in with air, it blow ur CO2 away.  those brown n white ring in ur filter is all filter media, and bio-ring.  it help you to keep the good/benefit bacterial in ur tank cycle.

how big is ur tank. if its a small tank less than 2 ft, its better u get a hang on back(HOB) filter.

is there any cover for ur tank. u hv to take out all the cover.. cover will be too hot for plants. they need temp below 28oC.

the filter u hv to change for sure. 

it is better u run ur cycle for 2 weeks then u start to plant, then check for ur ph.. till it stable around 6.x then u can add fish. don't rush.

got photo for ur whole tank? what substract u using?

WC = Water change
its hair algea, just manualy remove them. do more often Water change to get away extra No2, 3. what is the spec of ur co2 and light?

"Get a fan" here meaning install a "PC FAN" on top of your tank, to blow on to the water surface. Water evaporation takes off heat from the water. Check out Aqua hobbist website, most likely under the DIY section for such a setup.

32celsius...pretty high. Is it outdoor? Fishes you can keep in such temperature, maybe some koi, goldfish and cichlids. Or other local fishes like pacu etc...

with such high temperature( if it's constant)....sure wont get hit by Ick/whitespot.