how much water evaporation are you guys getting with your setups ? since ive added a sump ive noticed I get ? have more evaporation mostly cuz the last chamber where the pump is normally gets low when I check on things. seems im getting anywere from 4-8 litres every 2 days roughly is that amount normal ? I thought maybe adding a lid on the overflow box would help reduce it as it was also nosey when draining which it did quiet it down but I thought it helped for evaporation but apparently not lol .... I also have the top of the sump open, im thinking of putting lids on it as well to keep it as closed as possible, will this help or what can I do to stop the water from evaporating so much ? I just did a water change not last night but night before and I had to add about 7 litres today to the system