Ah, now I see what a sponge filter is. I keep reading about them, but didn’t know what they look like. Because the Paro’s like dim light, I have been wondering about the lighting. I know you can create shadow with floating plants, but the plants need light. If I want to have several small tanks next to each other, I need to think of a way to have the lighting, unless I purchase an individual tank light for each one (more expense).
Cheers,
Jonette