Yellow leaves and root rot? in New Bonsai

Hi all! I'm new to the forum. I hope perhaps one of you can guide me in the rigth direction. My wife gave me 2 weeks ago the Bonsai tree you see in the photos. The leaves are turning yellow and I don't like certain dark patches on the tree roots.I am concerned it could be root rot. The tree was labelled as Zelkova but I believe it is a Chinese Elm based on what I have read online. It seems they're often mislabelled in Europe. I live in Ireland and have kept the tree outside. This summer has been particularly dry and hot for Irish standards. The tree gets full sunlight around half of the day when it's sunny.  I've added water basically every day to every 2nd day and I bought a Bonsai liquid feed from Westland and have applied it once. I moved the tree inside for 2 days worrying that it was getting to much sunlight but then I moved it back outside because I read they are really outdoor bonsais. Not sure what  can be happening. All the info online is confusing because there can be multiple reasons for yellowing leaves. Any guidance is much appreciated. Thanks! 

I would just prune the yellow leafs and stop worry.

I see nothing else wrong on the tree except for some ugly looking roots. But that is just cosmetical and can be fixed in the future.

They grow chinese elms in Spain, so I am sure it does not need protection from the irish sun.

I grow chinese elms in sweden, so I am sure it wount need protection from the irish winter.

You may want to repot into better soil come spring. But only do so if it grew happy this year. If not, focus on the health and wait another year.

I made an extensive video about my take on chinese elm care. you may want to check it out:




 

As you have only just got this plant it is not unusual to lose a few leaves after a change of environment. This species is hardy and must be outside at all times. Watering every day at the moment is needed, you cannot overwater. The soil it is in is the usual stuff used and it will be ok until next spring when you can re pot into better soil. Don't keep moving it around, it does no good. Place it in sun for the morning and a bit of shade afternoon. Don't fertilise more than once a month. I can only see half of the plant so can't tell what it look like.

If you are in one of the urban areas there is probably a bonsai group near you. Join up with them and go to meetings. Google can help.

In particular, listen to when different people repot trees, when they root prune, how much they water, etc. Standard advice is to repot in early spring. That means when the tree thinks it is spring, which for a tree in Ireland will be different from a tree in Alabama. 

There is probably nowhere in Ireland where the tree will need protection from the weather, except heavy winds. But, the local bonsai folks can tell you what they do, and you will probably find somebody with the same species. The local guys can tell you what they do for fertilizer and other stuff. You can pay big bucks to import fertilizer from Japan, but you probably can find local fertilizer at a fraction of the cost. Same with tools. Same with components for soil. Same with pots.

Thanks for the advice. I will check the recommendations. 🙂

Thanks for the comments and the video! Very useful

Thanks for taking the time to suggest a few recommendations. I will definitely be careful with the fertiliser to not over do it.