dlwn88
Aquarium Advice Activist
Upgrading should be fairly easy. Use the substrate and all contents from the 30g for the 75g. The 75 will be 50% full, simply add another 25% fresh water one day, then fill it completely a few days later. In the meantime, use the filter from the 30 on the 75g along with any new filter you might have and you should carry over all bacteria with you.
Yeah that's what I've been doing lately. Still got awhile before it's done but it's getting there. No nitrites yet. I'd prefer to not have to tank overstocked, is this acceptable as long as I provide plenty of hiding spots?