My 90 gal project!!!

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Yet it one more more time lolol
 
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Updated plumbing and pump. Thanks again so much to roger, john, and Chris!!! :)
 
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The skimmer in question is an old "MadDog". They worked reasonably well for their time but like all skimmers from that era throw excessive micro-bubbles from it's discharge and is prone to rapidly clogging venturi devices. It is set-up correctly but really didn't need the external ball-valve as they are self-leveling to a limited degree. Once a bio-load is applied, if it skims very wet or is a completely uncontrollable foam machine remove the valve and run as-is. Also, you may want to remove the last bit a PVC after the ball-valve as it is underwater. Given the skimmer's design and the drain pipe is now submerged it is very likely for a siphon to develop a thus draining the body to quickly. You'll notice a very up and down unstable foam-head as the skimmer "flushes" it's self out until the siphon breaks. The effect will become routine and limit your ability to export dissolved nutrients.
 
The skimmer in question is an old "MadDog". They worked reasonably well for their time but like all skimmers from that era throw excessive micro-bubbles from it's discharge and is prone to rapidly clogging venturi devices. It is set-up correctly but really didn't need the external ball-valve as they are self-leveling to a limited degree. Once a bio-load is applied, if it skims very wet or is a completely uncontrollable foam machine remove the valve and run as-is. Also, you may want to remove the last bit a PVC after the ball-valve as it is underwater. Given the skimmer's design and the drain pipe is now submerged it is very likely for a siphon to develop a thus draining the body to quickly. You'll notice a very up and down unstable foam-head as the skimmer "flushes" it's self out until the siphon breaks. The effect will become routine and limit your ability to export dissolved nutrients.

John couldn't he also swap out that elbow coming from the skimmer Boddy for a T fitting instead? This way he could keep the discharge slightly under water surface to keep it quiet?

So should this skimmer outlet be more like the old euro reef with the sponge over the pipe and a riser pipe instead to catch the micro bubbles?
 
John couldn't he also swap out that elbow coming from the skimmer Boddy for a T fitting instead? This way he could keep the discharge slightly under water surface to keep it quiet?

Yes and even more quiet would be T fitting with a riser a vented cap. Either would prevent a siphon. However, if the skimmer tolerates the ball valve's presence and should he close the valve to much the exiting water will find somewhere else to flow. An open T-fitting or vented cap would provide a possibly messy escape route. IMO, the safest option is to raise the discharge above the surface. If splash-sounds are an issue incorporate a small elevated basket of carbon for the water to flow through. The carbon would be beneficial to the system plus help eliminate sound and micro-bubbles.

So should this skimmer outlet be more like the old euro reef with the sponge over the pipe and a riser pipe instead to catch the micro bubbles?

Nope, not EuroReef-like at all. Because of it being self-leveling the intent was for the discharged water just to be shot-out of the skimmer. Some ran the discharge over carbon, others drilled a hole into their bio-chamber of their wet&dry so the water flowed onto bioballs and there was those who did nothing at all. Marine aquariums were noisy beasts back in the day and the skimmer usually wasn't heard at all over the pumps or plumbing.
 
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After 2 days of no pump or lids on the tank my temp dropped all the way down to 73. That's 13 degrees lower!!! :) :) :). The wave line pump has been running now for about 2hrs after getting some leaky ends fixed and is 300% cooler than me old pump. Pretty excited and hopping everything stay good. I could not get it to drop from 85-86 over the weekend!
 
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