Also I have a new question about lighting. How many Watts on lighting would work for a planted aquarium (hoping to plant it quite heavy) of 17 gallons (US) need? I need 18 inch tubes if anyone could suggest one for delivery in the UK. (Also note that I do not want CO2 and would wish to keep Algae away as much as possible, as anyone would.)
I do not know the Wattage of my lamp and it does not say it on the lamp, but it's an Arcadia Original Tropical Plant Growing lamp and I think I have a reflector behind it, (It's like a white plastic curved sheet clipped to the tank roof.)
I think the lamp must be about 15 Watt so apparently reflectors double the wattage so i'd have 30 watts and about 2 WPG. Is that ok? I have it on about 9 hours a day but I do have a 2 hour siesta in the middle of the day.