Problem with indoor lemon or lime tree

hello
I was given cuttings of a lemon & a lime tree, do not sure which is which now 🙈 I think I this is the lemon - I feed them both weekly with citrus food, they are in the correct soil, one is fine which I think is the lime but this has white mottles/spots on - they are indoor on a sunny windowsill & this has just started to happen?
Csn anyone help please?
I water extra if they feel dry.
thanks
I was given cuttings of a lemon & a lime tree, do not sure which is which now 🙈 I think I this is the lemon - I feed them both weekly with citrus food, they are in the correct soil, one is fine which I think is the lime but this has white mottles/spots on - they are indoor on a sunny windowsill & this has just started to happen?
Csn anyone help please?
I water extra if they feel dry.
thanks
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we’ve had really hot weather here so I’ve been moving it back in case it was scorching, I’ll keep trying & thank you & I don’t mind long answers as it’s very much appreciated 😊
Yours look pretty healthy. I found the lemon was a hungry plant though (probably because it never stopped fruiting!). In addition to citrus feed I had to dose it with a sequestered iron and mineral mix whenever the leaves started to yellow.
Interesting what you say about limes, purplerallim, I only recall I couldn’t grow one in my last place. Too hot I expect.