Water motion in tank.

[Reefmaster]

troy and others
i don't remember the details but will look em up in my coastal engineering text from uni. what i remember from school is the moons gravitational pull is less so at the equator and more so towards the poles. will have to look to see if thats cuz the volume or mass of water is so much greater towards the poles. i've dove hawaii and they do have tidal exchanges, but cancun and bali for ex have very little tide. of course ther is still some, but not like what we get out by tofino! in the tropics i think the driving force for currents is wave action which results in surge hence all the surge devices. otherwise we would just run our pumps from one side of the tank for 6 hrs, then switch em up. thats exactly what we have on the west coast, especially places like quadra island, current moves up to 10 knots in one direction, then switches 6 hrs later. but i'll check on why i didn't think they had much for tides in the equatorial areas. as for diving i have dove the foreshore reef of cozumel and some of the lagoonal areas of cancun / play del carmen. as well as hawaii where i saw a 5' reef shark!

[Troy F]

Well, I picked up AFM's new issue and low and behold, an article on water movement by Ron Shimek. I see Darren already bought it. Too bad Ron doesn't really have any advice on how to improve water movement but only to select animals that don't live solely on a reefcrest.

Any of you physic majors feel like describing what Ron means by 1000mph water due to tidal action? I should re-read the article and post my question better but I don't have the time right now.

[Troy F]

Shane, sounds like some great experiences. I'm going to get certified next year if possible. The only problems I can forsee are that I'm a terrible swimmer, terrified of the water and claustrophobic. My boss is a diver and has a great underwater camera. I should try to get his pictures for the next reef club meeting.

I just received the Wave2K promotional video, it looks pretty good. They claim it has been running problem free for more than 18 months. I'm really leary of the design but I'll tell you, it sure does do a good job of creating the motion we're all trying for. I think it costs about $448 cdn though so they'll have to satisfy a few points of concern before I fork that over.

Steve could you share your plans on the sinusoidially varying valve arrangement? I'm most interested in a parts list.

[Silverfish]

Hey Troy, how ya doin'? I was looking at the wave2k and it looked like it was pretty big, (centre model) I was wondering what it would look like in my tank? 36"x18"x20" ... Probably be nice in a bigger tank eh?
I already have a lifereef overflow that is too big, wish my tank was drilled! [img]images/smiles/icon_biggrin.gif[/img]
-Bruce

[Acro]

hey troy quite watching video's and get that tank running [img]images/smiles/icon_wink.gif[/img] I was wondering if the video is on a empty tank or stocked sounds like I'll have to come and watch it one day perhaps even help put some water in your tank hehe later jamie

[DJ88]

mmmmmmm. reef shark...... [img]images/smiles/icon_biggrin.gif[/img] Man that is an animal... oh to have a 10,000 gallon tank for a shark.. sigh..


Hey troy you coming by sunday? Scott aske dif it was ok.. COME ON OVER! only a three beer tax will be levied.. [img]images/smiles/icon_wink.gif[/img]

[StirCrazy]

Sure Troy I will post the equipment when i figure it out, the guy who did it did it from the top of his head and never made drawings or such so I am re inventing the wheel [img]images/smiles/icon_smile.gif[/img] but it isn't that hard.. I will post what I am using and how much as I build it and I am also goign to do a detailed set of drawings for it.. (go figure that I would actualy be doing what the military trained me for on a fish tank [img]images/smiles/icon_biggrin.gif[/img]

I just had knee sergery today so if I don't answer much this weekend it is because I am druged up on the couch watching my 50" tv [img]images/smiles/icon_biggrin.gif[/img] [img]images/smiles/icon_biggrin.gif[/img]

Steve

[DJ88]

Get well there Steve.. [img]images/smiles/icon_smile.gif[/img]

What kind of Knee surgery? Arthroscopic?

[StirCrazy]

ya I think thats what it was called hehe the 3 tubs in the knee and they poerate on video through the tubes..

Steve

[Troy F]

Jamie, you are welcome to watch the video anytime and it is on a stocked tank (quite nice actually).

Bruce, I think the Wave2k would look huge on a 36" tank, I believe it is 18"x18"x4".

Darren, I didn't know you were having people over but if I get time I'll definately swing by.

Steve, I'll look through my files, I believe I have some e-mails from Robert that may help. There is also a guy on reefs.org that was going to make a version that would have a sourceable parts list. I'm going to look into finding him again.