FILTRATION
- How to handle an external filter input and output?
- How big should be an external biofilter for 420 L aquarium?
- How often to change filtration media in an external biofilter?
- How to cycle an external biofilter in order the essential bacteria could reproduce?
- May I put the heater into the last filter chamber?
- May I use the common yellow foam as a filtration medium?
- How to solve an internal biofilter for 550 L aquarium?
- Why are the chambers in the filter scaled from the highest to the lowest?

CANOPY AND LIGHTING
- How to solve the place over the aquarium build into wall between two rooms for lighting and maintenance?
- May I connect T8 fluorescent lamp to the electronic ballast assigned for T5 lamp?
- Must I place the glass between the aquarium lights and water level?
- What was the cost of the canopy building?

3D BACKGROUND
- May I glue the rocks to the styrene board using the polyurethane foam?
- How to defat the aquarium glass and rocks before they will be glued?
- What is the long-term experience with the background made of marl?
- May I use any polyurethane foam for background building?
- How to clean the rocks of moss and other dirt?
- What kind of silicone may I use for polyurethane backgound coating?
- May I apply the polyurethane foam during the PU background building directly to the back wall of the aquarium?
- How to spread transparent silicone the polyurethane foam or styrene background?

OVERFLOW TO EXTERNAL FILTER
- May I use the float switch into the biofilter to control the water level in the main tank?
- How an overflow works?

STAND AND THE CABINET
- Where should be the horizontal braces of the stand placed?
- May an aquarium be supported by the styrofoam pieces only at its edges?
- Should be the stand legs supported?

ENERGY SAVING LAMP BALLAST
- May I connect 18W fluorescent tube to the electronic ballast from 17W energy saving lamp?
- Is it better to use the electronic ballast from the energy saving lamp than the regular one?
- Which wattage value of the energy saving lamp should I regard when I use its electronic ballast for lighting?