Hi all . New to this site . Have kept fish for around 18 years now . Tropical , tropical marine , shrimp tanks. Have decided to do the tank I've always wanted . A native uk marine tank. I have a 250litre tank with a eheim professional 2 filter. This will have all media in as the tank will obviously have live sand , as I live near the ocean . I will only be filling the tank just under halfway as I am building a water dumper(like a dumper truck bucket ) to simulate waves and to oxygenate the water . Will post photos as build commences. Still making things for the tank . Anyone any tips ?