I like to avoid the use of heaters if possible because they can fail and electrocute your turtle and potentially burn your house down.
Ask yourself how cold do you let your house get ever? Is it above 60f? You don't need one then.
I recommend this timer. I have 3 of them: GE 24-Hour Heavy Duty Indoor Plug-in Mechanical Timer, 2 Grounded Outlets, 30 Minute Intervals, Daily On/Off Cycle, for Lamps, Seasonal, Christmas Tree Lights and Holiday Decorations, 15075 https://www.amazon.com/dp/B00366JSNU/ref=cm_sw_r_cp_apa_i_eFQpFb4MJG3TJ
Don't feed your turtle daily or worse twice daily.
Change your UVB/UVA bulbs every 6 months if they are CFL like this one: Zoo Med ReptiSun 10.0 Mini Compact Fluorescent Lamp https://www.amazon.com/dp/B00A8RHTYU/ref=cm_sw_r_cp_apa_i_VGQpFb6P1DE4G
YBS need extra UVA/UVB so go with the bulb I linked or a similarly powered one.
You also need cuttlebones. Exo Terra Sepia Bones for Turtles https://www.amazon.com/dp/B002YPZDBK/ref=cm_sw_r_cp_apa_i_eIQpFb2ZFDZR0
Any cuttlebones will do though.
Here's my water treatment: API QUICK START Freshwater and... https://www.amazon.com/dp/B006YG12F6?ref=ppx_pop_mob_ap_share
API TURTLE SLUDGE DESTROYER... https://www.amazon.com/dp/B00ESBHN1Q?ref=ppx_pop_mob_ap_share
API TAP WATER CONDITIONER... https://www.amazon.com/dp/B004LO9KSY?ref=ppx_pop_mob_ap_share (FYI you almost certainly have chloramine not chlorine in your water.)
API AMMO-LOCK Freshwater and... https://www.amazon.com/dp/B000255N0A?ref=ppx_pop_mob_ap_share
Get this to test your water: API Freshwater Master Test Kit https://www.amazon.com/dp/B000255NCI?ref=ppx_pop_mob_ap_share Ammonia, nitrates, and nitrites are your enemy.
Don't buy a dock. Make one from egg crate diffuser materials and zip ties: https://youtu.be/KDb6cv5I9Tg
Your turtle needs to get fully dry on top and bottom or they will get shell rot. I had a zoomed dock that cost 50$ and I replaced it after a scare with shell rot.
Thanks!
I have a floss pad, ceramic rings, and a Filtrx pack. I also use sludge destroyer, and water conditioner from API Turtle and Flukers Eco Clean for water changes.
I think it takes about three months to require cleaning for the canister filter. And every week I refill the water that evaporates.