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It’s basically how my original open water instructor described the purpose of a knife while scuba diving. He said the purpose of it was not to fend off sharks or other such things, but instead to stab your buddy so you could get away. This was in the early 1990s, so the general idea of a scuba...

I have bought a fair ton of scuba diving gear from just these kind of people. One guy in particular went from open water diver to beginning technical diver in about three years. Realized that the next step to becoming a competent technical diver was going to take him a couple of years of hard...

Where’s the 0 meters option? :) My favorite part of owning my own compressor: I dive EAN32 on every dive (or trimix where appropriate).

I live in the metro Detroit area so I don’t have direct knowledge of mid Michigan, but I don’t believe there is a ton of exciting scuba diving in that area. Around here, we have three common options: One, trek down to the Ohio quarries. Most people go to Gilboa, but I greatly prefer white...

I have a single piece of 2 inch PVC filled with aquarium bio balls. I inject the O2 at the top, then probably 4 inches of empty space, then 18 inches of bio balls, then 4 inches of empty space, then my O2 sensor. My O2 sensor uses the screw-on sampling tip: that is what is inserted into the...

This is welcome news to me. As someone who goes out on the Ho Hum on occasion and hates both the sound and smell of engines, anything that is quieter and with less smell is welcome to me. At least they’re not diesels. :-)

And that’s why traceable back to to manufacturer-supplied document matters to me. It’s possible those are swapped. It’s possible that the tank is floaty with and without gas, and the negative means positive buoyancy. Or, it’s possible it’s flat-out wrong. At least with the...

To add items to the list I maintain, you need the following information from a manufacturer-supplied source! Dimensions — including water volume Weight Buoyancy full Buoyancy empty Without those, it doesn’t go in the list I maintain. HOWEVER: that’s why I include the spreadsheet. Feel free...

Not my most liked post, but one that definitely draws enthusiastic response from those who try it. If I had a nickel for every time @Tracy has texted me about him using the process, I’d have two nickels. Which isn’t a lot, but it’s weird that it’s happened twice. :-) I used it a couple of...

As an American and literally the only person I personally know who is ever been to Egypt (for any reason), I would reinforce that. When I tell people I went to Egypt for a scuba trip they look at me like I have three heads. Their usual reaction is something like: “why on earth would you go to...

I find that O-rings that have spent more than a couple of years on a tank become completely triangular in cross-section, to match the bevel of the O-ring land in the tank. And looking at them, it seems as if the material has even changed consistency, from rubber to plastic. And I too have...

Excellent job really digging into this! The only purpose for lead is to keep you neutral at the point of maximum buoyancy. And that point is when you have minimum gas (i.e. “empty” tanks) and maximum suit buoyancy (i.e. at minimum depth — at the safety stop). That means that for weighting...

I think you’re confusing Gilboa and white star. Maximum depth at white star barely gets below 60 feet. There’s one specific spot you have to go in order to hit that 60 feet (inside the crusher). It’s actually a problem for teaching advanced classes there, because you have to go below 60 feet...

I just reread your post. For me, “Lake Huron“ means the tip of the thumb, because I live in the Detroit area. But if you mean the whole lake… There are so many possibilities! Alpena is a great place with lots of wrecks. There is a wreck called the Nordmeer: A 471 foot long freighter in 40 feet...

My favorite of the recreational Lake Huron shipwreck is the Regina. 70 feet of water makes it very approachable with plenty of bottom time. For those with the training and skill, it is a very easy wreck to penetrate, yet allows you to grow into more advanced penetration opportunities as well...

I echo the general thoughts of the people writing above. What you’re descr is a pretty unique configuration. Unless you truly have substantial and very unique requirements, I would suggest that you create a configuration that is a little closer to the tried and tested configuration that...

You can certainly do it that way… And if they’re excessively long, and I had everything else positioned exactly where I wanted them to be but there was still too much bolt left, that’s pretty much exactly what I would do. However, if that truly is threaded rod (and not a bolt) on your tanks, I...

The best write up from a starting-from-nothing perspective that I know of is probably again @clownfishsydney’s website: https://www.michaelmcfadyenscuba.info/viewpage.php?page_id=16 This documented the process by which he purchased his compressor, now a quarter of a century ago! It also...

Last time I figured this out (https://scubaboard.com/community/threads/lot-of-complaining-goin-on.16999/page-5#post-9732812) I was paying $15 per fill. Notice that I have $6000 for the acquisition cost for my compressor. That was $4000 for the compressor itself (a 6CFM Bauer-based compressor...

The SRB 5300/5700/5900. The one that inspired this thread about cleaning the laser-drilled orifice: Cleaning Sherwood First Stage Laser Drilled Flow Control Hey, it’s a great conversation-starter! :) And I prefer the SRB 3200/3400 second stages. The round ones with concentric grooves...