Haven’t touched my tank in close to a year

I haven’t added or removed any water since late last August (the water was filled about a little over a quarter of the tank) and has a yellowish orange tinge. me and my dad have been too lazy to figure out what to do when spring comes and I’m able to use the hose. I’ll clean it out and see what I can do from there. My sister-in-law knows a ton about fish keeping she’s done it since she was around my age 14/15 and is now in her 20s