not sure atam 1/2hp is enough for my tank?

[[JS]]

my tank 4x2.5x2

sump 3x1.5x1.5

light 400w

pump 200w

[Vinoth]

You mean atman? Atman 1/2 HP is recommended volume is 400 litres. I guess yours will be more than that.

[[JS]]

then is not enough ?

any chiller recommed?

[Vinoth]

Mine also similar to your tank.

Tank 4 x 2 x 2 sump 3.5 x 2 x 1.5. I am trying Teco RA680. Bought from a fellow reefer. Still testing. But able to maintain at 27.

[[JS]]

not sure 1 to buy atam chiller

quite cheap ....

[Vinoth]

I also had the same confusion. Finally opted for teco. Also atman dont have diffrential temperature settings. If i am not wrong, it kicks whenever the temp change by 0.5 degrees. Not sure whether 1 or 0,5 degrees. However you can mod your atman by using external temp probe.

[moron_clown]

its better to start with a tested and trusted brand than to regret it later on and selling the chiller at a loss.for ur case i reccommend a 1/2 hp chiller which can cool at least 800l.examples are reef relief chillers.