without changing water

Hello My name is Vlad. I live in Kharkov, Ukraine Let me represent you my marine aquarium (MA) and explain it’s maintenance. My Marine Aquarium (MA) starting from 27.01.2011 My MA system contents: Heater 2 pcs 100w Pump flow Boyu WM- 2 + SunSun JVP-101 Light 150W mg + 7pcs. blue LEDs cre...