Who Gives A Fish Forums

What about flow rate? Does the sump size affect how fast you can run your return pump? I've got a 1200 GPH pump, but not sure if that's too much for a 30-gallon sump.


A 1200 GPH pump is fine for a 30-gallon sump, but you'll need to dial it back with a valve or use a manifold to split the flow ...

What's the smallest sump you'd go with? I'm tight on space under my stand and can't fit a 30. Would a 15-gallon work if I skip the fuge?


A 15-gallon is sketchy for a 75-gallon tank. You'll struggle with evaporation and might not have room for a decent skimmer. If space is tight, consider an ...

For a 75-gallon tank, I'd recommend a 30-gallon sump. It gives you enough space for a skimmer, refugium, and return pump without cramming everything. I run a 30-gallon sump on my 80-gallon system, and it's been perfect for maintaining stable params. Just make sure your baffles are spaced right to ...

What's your nitrate level? High nitrates often feed algae. Test your water and if it's above 20 ppm, more frequent water changes might cut it. Also, scrub the glass during changes to remove buildup.


Yep, nitrates are key. If you're using tap water, check phosphate levels too. Some municipal ...