@Tom H looking forward to hear your feedback.I have ordered a Gyre 130 for my HL600, so I hope it will work. It's supposed to arrive this week so I'll let you know how it goes.
Hmmm .. tempting ... Flow rate is higher than my Jebao RW4 ...Vortech MP10WQD would be a good choice on the side.
Yup that is another solution.Why don't you place the two tunze lower on the back wall and direct the flow upwards to agitate the surface?
Vertical, LHS of back overflow panel is the plan. I will try both sides to see which works best with my rockscape.Are you planning to mount it on the back panel? it would be vertical mount, I would assume and only on 1 side (either left or right).
@Tom H am pretty sure yours are with sand yeah?thats a lot of movement for a small tank.
might make a mess of the sand
2mm crushed coral substrate, about 2cm deep. I don't think the Gyre will stir it up, but if it does cause problems I'll look at a bare bottom or heavier substrate. I'm pretty keen to make the Gyre work in my tank, it has great reviews and should give me really good flow.@@Tom H am pretty sure yours are with sand yeah?