at the moment top up just water it is a manual water does not come back
Don't do that as the water will evaporate quicker from wherever it's escaping to and It will get worst with just water you will end up topping it up twice a day like I did until I did a full flush and refill. Now I just top it up every 3 months. Mix the correct mix up and top up with that.at the moment top up just water it is a manual water does not come back