what size of sump for a 75 gallon

[Dolf]

I would be shocked to see anybody on this forum state anything aside from bigger is better for a sump. If you can fit a 220 gal sump then go for it. More water volume= more stability. More space= easier access and the ability to have a fuge, a skimmer, a place for frags, a... Well anyhow, if you can not fit it then go with the biggest that you can fit.

Now, as for the skimmer (I will duck for cover later) you can keep a successful tank without one. It is a little more difficult, and you need to look at what you are doing, your stocking levels and your feeding habits, but it can be done. I will try to find some links later.

Now for an important part- if it has miracle mud then either leave it intact in the sump or let it cycle for a few months if you transfer sumps. One of the ideas (from what I recall) behind it was that it acted as a deep sand bed- a nutrient sink. If you disturb it you disturb all of the bacteria that breaks down the nutrients and you release gobs of things to your tank that you don't want released. I need to get to sleep, so I will try to remember to get back with some other thoughts...

[e46er]

i have a 4 x2x2 display tank and my stand is 4 ft with plywood all around the inside to help with noise i decided a 40G breeder 36x18 would be best for me skimmer on left section return in middle and a small fuge on the right side. i have a large external CL pump 3 power bars 2 MH ballasts and a two little fish phosban reactor one running carbon and the other running phosphate media.

i also agree with stated above go with as big a sump as possible BUT leave some room in your stand to accomadate everything else you need.

i wish i had built my stand 2 ft longer with a cupboard beside the tank for extra storage (test kits food ect)