Help decide flow for 20g high

Joche

New member
Hello RC!

I'm looking to set up a permanent display/frag tank using a 20g high. The majority of future additions will be acropora and montipora but I plan to add 1-3 of either softies, LPS, or a single BTA (yes only 1-3, lol).

Since I'm in a location with warm/humid climate and super high energy costs I need to keep an eye on the energy consumption of equipment and I need to keep cost of equipment as low as possible.
I decided going sumpless and skimmerless and using LED while allowing for frequent water changes to do the work, I just can't decide what to do for flow. Not spending so much money on Vortech and definitely not getting Jebao or other knockoffs either, and while random flow is nice, I'm ok using simple timers and switching pumps every 8-12hrs or even constat flow 24/7.

My choices denoting pumps, flow, and energy consumption.

From Tunze:
-2 x Tunze Turbelle Nanostream 6015 (475-950gph) 3.5-7w
-2 x Tunze Turbelle Nanostream 6020 (620-1,240gph) 5-10w
-1 x Tunze Turbelle Nanostream 6025 (740 gph) 5w
-1 x Tunze Turbelle Nanostream 6045 (400-1175gph) 5-7w
-1 x Tunze Turbelle Nanostream 6040 w controller (53-1190 ggph) 5-10w Rather not spend so much on a pump though, lol

Sicce:
-2 x Sicce Voyager Nano Stream pump (530-1,060gph) 3-6w

Rossmont:
-1 x Mover M900 Powerhead (900gph) 6w
-2 x Mover M900 Powerhead (900-1,800gph) 6-12w

I need to get the most performance at the lowest energy consumption with the least amount of money while mantaining the reliability, ease of hiding, and customer service which is why the list is mostly Tunze, but sometimes we need to save money:p

Could see my self with a DIY rock cover for anyone of them because who likes to see powerheads inside the tank?
 
Let me be more specific, do you think a single Tunze 6020 or a single 6025 is enough flow for a 24" x 12" area?
I'm thinking since there is no filtration, I only need enough flow to break the "boundary layer" on the coral (as Dana Riddle describes).
 
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