Can I make a bog garden with sphagnum and no peat moss?

I don't feel comfortable using peat moss due to its unethical harvesting and just negative environmental impacts. I want to build a bog garden with just sphagnum and not use any peat will the degradation of sphagnum be fatal to my plants. Like as long as I keep adding more every year will the rotting sphagnum actually damage the plants. Does anyone have experience making a bog with just sphagnum.

I currently have a 4 gallon bog planter that permanently has 3 to 4 inches of water in it and it's just sphagnum and I've had happy plants for 1 year and I want to expand to a 10 gallon bog garden before they break dormancy but I dont have enough experience to know if this is going to kill my plants eventually. If the information is important it's mainly sarracenia with a group of vfts and some sundews. And I'm zone 7b.