Are tankless water heaters reliable ? Are they trouble-free ? Do they heat as well as a tank-based system ? This is for a rental unit with 2 bathrooms .
We recently bought 2 simple goldfish , both about 6 cm long . We 're trying to give them the best care possible so they live a long and healthy life . We do n't have too much cash to burn so we went with a tank of 40x27x24 cm . This holds about 26 liters of water . Will this be okay if we change the water once a week , or do we need an upgrade for them to be happy ?