Filters and Sun viewing

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Good Evening everyone

Just after some general pointers , picked up a second hand Helios 120 / 1000 refractor on Monday afternoon and was blessed with clear skies last night and coudntl belive how good the viewing was with it, looking at Jupiter the seeing was better than my Skywatcher 150p that said there was some slight coloring (which i understand is not unnormal for these scopes) albeit it didnt spoil my viewing.

I was theirfore wondering is it possible to obtain a filter to limit this and if so some pointers on what type would be very much appreciated.

In addition suggestions / pointers would be welcome on what filters and anything else i would need for viewing the sun either with my skywatcher 150p or my Helios

Many Thanks

Philip