Choosing phosban reactor for 250 gal tank?

[Delphinus]

Precision Marine makes a substrate reactor which is the same thing as the TLF Phosban reactor but comes in two sizes and the larger one looks fairly significantly larger at 26" heigh with a 4" diameter chamber (the smaller one looks to me roughly the same size as the TLF). Although J&L doesn't list it on their site, I inquired with them a couple months ago and they can order you one.

But running them in series works too if you need more media.

I have two (of the TLF Phosban reactors that is), each running carbon on different tanks (for which they work really well). I have one of the first models and one that I bought a couple months ago. The new design is much much much better, so much easier to work with. The early models had a bolted flange, but the new ones have a twist lock. Changing out media on the newer model is a snap.