It's been a year this weekend since we first put fish in our tank. I do weekly water changes and rinse the filters out fortnightly (ie one side each week). The water looks very clean and all the wood and stones are very clean (we have a plague of shrimp at the moment) but the gravel is looking a bit green.
My parents do an annual full clean (ie fish in buckets, tank emptied and scrubbed clean and gravel washed)
Is this a good idea? I'm scared to mess too much - partly because we have loads of baby shrimp and I'd never find them all, and partly because we had a rocky start and things are now very well balanced and water quality is excellent.
Is it worth scooping out some gravel and giving it a good wash and replacing without disturbing the whole tank?