Most of mine are nickel size, but the one pictured is about 2 inches across.
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Does anybody recommend buying a sponge to purposely grow? I'm too afraid to order one because it can die if it gets exposed to air. I'm sure I could do it but it still makes me nervous! And it's not like they're super cheap. Also not sure if 40 gallons is really enough water for one.
What would you recommend for a beginner sponge that is photosynthetic? I'm still in the process of trying different things and seeing what I like. I just put red grape macroalgae in my tank and so far it looks surprisingly good! Also trying different things that could help with my nutrients and the few fish I keep.Certainly depends on the kind. Some sponges can be exposed to air no problem..
For those that cant if they are shipped right allot can survive.
Problem with some is they feed on stuff like bacteria and slowly starve. Some also require silicates to grow.
Seek out the photosynthetic sponges they are about the easiest to grow. They can grow fast giving the proper conditions too..
Here are some old pics of some of my sponges I am growing:
What would you recommend for a beginner sponge that is photosynthetic? I'm still in the process of trying different things and seeing what I like. I just put red grape macroalgae in my tank and so far it looks surprisingly good! Also trying different things that could help with my nutrients and the few fish I keep.