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Thanks. I have used silicone within the past week, when I built the sump, and I added AquaSafe to the new salt water used to fill the sump 2 days ago. I just put some activated carbon in a Fluval 304 and turned in on. I will remove the lift tube from the elbow. Should I continue to let it run...

I just purchased a new Euro-Reef protein skimmer (CS8-1). After starting it, it continues to overflow with very wet foam. It fills the cup with foam which turns to water. The cup is full of water in less than 2 minutes. I followed the set up directions to the letter and it sits in 7" of water...

A plenum system is a deep sand bed (DSB) (3-4 inches deep) on top of an undergravel filter (plenum) that has been capped off, not allowing water to enter through the lift tubes. This creates a dead water space underneath the sand. It is much safer than a DSB without a plenum because there is...

BlueMarlin, My understanding is that a DSB should not be your primary biological filter, rather your LR rock (or a wet/dry filter in a fish only tank) is the main engine that processes nitrates. DSBs reduce nitrate which will otherwise contiune to build. Water changes also reduce nitrate build...

Kmart, If reducing nitrates is your goal then you should look into a plenum. It's cheap, takes up no space and it will reduce nitrates at least as well if not better than a refugium. For reef tanks, plenums additional benefits such as adding calcium to the water and providing additional...

If you want to keep things simple and inexpensive, relativly speaking, then check out GARF's Bullet Proof Reef aquarium set up (site has an online calculator for your size tank). <a href="http://www.garf.org" target="_blank">www.garf.org</a> This system seems to works well for them. They are...

Just thought I'd throw this out there as another option. I have a 90g with 75 lbs of aragocrete rock made at GARF. Paid $2 a lb (broken pieces), then sprinkled 10 lbs of GARF Grunge (live sand) over the rocks to seed them. It takes more time, but its an inexpensive solution and it helps the...

Thanks, Shark. So, what do you do to contol nitrate buildup? Rick

What is your main purpose for using a refugium?

Thanks, Ed Rick

Thanks. Do most DSB users still use a sump & wet/dry filter or just the DSB, LR & Skimmer combo? Rick

A plenum is basically an under-gravel filter that has been capped (shut off). It creates a dead space of water below the sand which removes nitrate from the water. It also adds calcium (when using aragonite sand) to the water provides some positive buffering. Link: <a...

If it does the same thing, then why do GARF and others use plenums? Do plenums work better? Understood regarding multi postings. However, I didn't know if evergyone looked at each forum?

How many of you use plenums in your systems? If not why?

How many of you use plenums in your systems? If not why?

How many of you are using plenums in your system? If not why?