I care for hundred's of seahorses every year and in my personal collection i have 20. They are lined seahorses. In the tank i use toga branch LR and for filtration using spunge filter's are the best or you can use a skilter they work very well also (it's great it's a filter and a pro skimmer in one). Do you keep seahorses?
Hiya DNordbak, Welcome to MFK. I did a search of a couple sources including fishbase and while I found several brackish seahorses I fpund no truly fresh water ones thousgh there is a nice fresh water pipefish from India thru Indonesia area named Ichthyocmpus carce that gets about 6" long, the one in the pic was caught in Cambodia