I use a syringe with a 10cm blunt needle for dosing liquids into the tank. Being a blunt needle I have not managed to stab myself yet but early days 😀
I personnally use 1mL insuline syringe. You can remove the needle with pliers, but be careful when you do it.
Also you can make your own magnetic algae scraper with neodymium magnet and a roll of velcro. The only issue is that neodymium is pretty fragile.