I'm an Ariel Colour Fan
I use ASDA 2in1 Tablets for Whites, the pink box orchid and pearl, yes very gay indeed!
Ariel Colour Powder for Darks, Love that smell, its the old Pre 2006 ariel scent that the bio powder used to have, and I can use it on whites as well and it cleans just as well, so its not always necessary to buy a Whites Powder. Mind you I don't own many white items.
Lenor Spring awakening and Febreze Effect Softeners.
I do all my laundry at 30/40 degrees and Haven't had any problems.
With the Ariel Colour though because i'm a student i only use a small amount and I can make one 10 wash box last about 20 washes. All my laundry comes up clean and fresh.
I bought ariel tablets a while ago to try out and it gave me a headache when i was hanging the washing up to try, it has a really sickly pungent smell, they smell like the powder now.
I would recommend trying Asdas Bio Tablets, Daz Tablets, and Persil Gel Tablets on Whites.
Or better yet try Ariel Excel Gel!