waterflow

[randallcentral]

About how much GPH do I need for a 20gallon?

 

[kkyyllee]

400

 

[sir_dudeguy]

at least 400. I've got more than that in my 10g though. You want to get at least 20 times turnover per hour...so 20 gallons, times 20 is 400gph total. Personally, i always start with more than that...closer to 30 seems best for my tanks which have a nice mix of softies/lps. Once i start adding some sps soon, i'll be upping to about 35-40x.

I recommend getting 2 of the Hydor Koralia #2's...400gph each.

 

[szwab]

depends on what types of coral you plan on keeping.
also flow in the tank is the most important IMO which can be accomplished by moderate or low flow through the sump and back supplimented by in tank cirrculation or by a high flow through the sump using a powerful pump and little to no supplimentation in tank.

 

[randallcentral]

so a mj mods 1500 gph is too much?

 

[szwab]

not necessarily. try it and see how the corals react. the mod is not a laminar flow and has a broader "stream" if the corals like it use it there realy is not hard fast rule.

 

[randallcentral]

the 2400 kit? that overkill?

 

[randallcentral]

has anybody used these? http://www.drsfostersmith.com/Product/Prod_Display.cfm?pcatid=15955&N=2004+113040

 

[szwab]

I have not personally but know of people who have them and like them. check in the lighting and equip forum there should be several threads on them.