Floor board Support/PT wood

[Tunnaman88]

Access panel above my as tank needs a little support. I pulled it up and to no surprise, it need more support boards. The few that it has have started to rot. Question.. is it a bi deal if I use pressure treated wood? I know it wont last as long, but if I check on it in a few years, whats the big deal? It would be better than it is now. It was good to now the tank was a new custom 2007 aluminum 54 gallon