i usually do weekly 50% water changes and gravel vacs on my smaller tanks, and alternate filter cleaning biweekly. the big tank i clean the filter pad in the wet/dry every couple of days and do a 40% water change with gravel vac every 2 weeks.

I do bi-weekly water changes and vacs as I have high filter turnover on most tanks. I clean non-canister filters every 2-3 weeks and canisters about every month - month and a half.

I do 30% water changes once a week. I have multiple filters on my tanks so I alternate cleaning them once every 2 weeks. Also I clean my sumps once a month.

When I'm a good girl, I do a 20% water change in each of my tanks a week.

That's 1 bucket in the Jebo 338, 4 buckets in the 3ft, 6 buckets in the 5ft and 'a few jugs' in the 1.5ft.

Oh, and filters - when they start to go "cank cank cank" I reckon it's about the right time... Those are with my internal shitty ones. Approximately every 6 months?
My trickle filter I don't know. :P Hasn't been going for all that long, so will just have to see how dirty it gets how soon - however, it's a bitch to get into so it will probably be about the same.

30% weekly water change and gravel vac on all tanks and monthly filter clean.

20% water changes on my 20G every week and 30% water change on my 38G every week. I do a gravel vac every week to every two weeks. The 4 Betta bowls get cleaned every 1-2 weeks, depending on how dirty they get. Filter wise I do a thorough clean every month.

25% water change weekly.

Rinse filter matterials as needed in tak water.

Stir sand every two weeks.

Service fluval cannister monthly.