SKU: 54839493998

Yellow Hydnophora

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Description

Yellow HydnophoraYellow Hydnophora is a striking coral with a temperament that sits halfway between SPS and LPS, and a personality best described as looks polite, hits hard. Its neon yellow green glow makes it an easy seller, but it needs thoughtful placement to avoid warfare. Heres a practical care guide built for real reef farm conditions. Lighting Moderate to high light works best. Around 150 to 250 PAR keeps the yellow vibrant and prevents browning. It doesnt

Yellow Hydnophora is a striking coral with a temperament that sits halfway between SPS and LPS, and a personality best described as “looks polite, hits hard.” Its neon yellow-green glow makes it an easy seller, but it needs thoughtful placement to avoid warfare.

Here’s a practical care guide built for real reef farm conditions.

Lighting

Moderate to high light works best. Around 150 to 250 PAR keeps the yellow vibrant and prevents browning. It doesn’t demand extreme light and actually holds color well under mid-range intensities, which makes it flexible for mixed reefs.

Flow

Moderate to strong, with a turbulent pattern. You want water that rolls over the coral from multiple directions so debris doesn’t settle between the ridges. Consistent movement also helps maintain tight polyp extension.

Placement

Give it space. Hydnophora is notorious for tissue-contact aggression. It doesn’t send long sweeper tentacles, but if it touches another coral, it usually wins and melts the neighbor’s tissue. A few inches of buffer is wise.

Place it mid to high in the rockwork where it gets light and flow without brushing against anything.

Water parameters

It thrives under SPS-like stability, though it’s more forgiving than Acropora.

Calcium around 420.
Alkalinity around 8 to 8.6.
Magnesium near 1350.
Nitrate 5 to 15.
Phosphate 0.03 to 0.1.

Ultra-low nutrients can dull the yellow and slow growth. Slightly nutrient-positive systems keep it glowing.

Feeding

Primarily photosynthetic. It does not need direct feeding. Occasional amino acids can sharpen color but not required.

Growth behavior

Yellow Hydnophora forms thick, knobby branches or mounding plates depending on flow and light. Growth is moderate, not explosive, but steady. It develops a sculpted bumpy texture that customers tend to love.

Temperament

Highly aggressive on contact. Think of it as an LPS-style fighter disguised in SPS clothing. Never let it touch fleshy corals or delicate SPS.

Sensitivities

Stable alkalinity matters. Sudden swings can cause recession at the base. It’s not commonly targeted by SPS pests, but it can suffer from bacterial infections if damaged.

Compatibility

Best in SPS-dominant systems or high-flow mixed reefs. With proper spacing, it becomes a safe and stunning centerpiece.

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SKU: 54839493998

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nicolas juarez
Phoenix, US
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"Outstanding support and a seamless process!"
Great experience with Asurion insurance through Amazon. I wasn't sure how to register my items for the monthly plan, but the customer support team in the chat was incredibly efficient and guided me through the entire paperwork process smoothly. Furthermore, the service I received at the repair shop (Break Fix) was excellent. The whole process was seamless, and I received my digital gift card without any issues, which I’ve already applied to my Amazon account. I am very grateful for their professionalism and how easy they made everything. Highly recommended!"
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Toveth Noyse
West Palm Beach, US
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Received giftcard money to replace my plan-protected malfunctioning motherboard
I've been subscribing to the Asurion protection plan for a while. Recently, an Asus Prime PC motherboard I had bought a few months ago on Amazon stopped working well. I ended up considering filing a claim with Asurion to see if they would either fix/replace it or issue the purchase price money, so I could buy the failed electronics replacement component again for my custom-built PC. I went to the protection plan's website and started the claim filing process but couldn't find the category my failed component would be under in order to select it from the drop-down list. I ended up messaging the live customer service. The chat messaging was somewhat slow, the agent told me they were experiencing some communication delays throughout their systems. Ultimately, the agent was very kind and understanding, and completed the claim filing process for me on her side by asking me to provide the necessary info such as the item's product name, date of purchase, price before taxes, etc. I received a printable UPS shipping label in the email, printed it, and returned the item in the mail. Approximately 2 days later, I received an Amazon giftcard code in the email with the dollar amount equal to the item's price before the sales tax. Then I redeemed the giftcard code on the Amazon page and proceeded to apply the giftcard money to my next purchase of a replacement Asus prime motherboard, and it all worked out successfully. Therefore, I had no issues with the protection plan service and recommend it to others.
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Reviewed in the United States on May 24, 2026
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Steve
Alexandria, US
★★★★★ 4
Fast and easy but I dont trust the process to be fully automated.
The process was very smooth and fairly quick. The only challenge I had was that the CLAIM status showed complete but I had to manually go look up the status. There was no email or notification it was closed. After manually checking the status, I called customer support and they said since I called in, they would process the payout. I wonder if I didnt call in if they would have processed it? Also, the phone rep said they would issue me a amazon egift card but then the next day I received a email saying they mailed out the payout. Very poor communication but so far the process was easy and fast.
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Reviewed in the United States on April 1, 2026
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Allen
Boise, US
★★★★★ 5
Nice functional printer at a low price-point
Style: WF-3820
At this price-point, the WF-3820 is a winner for a home printer with not much printing volume. It prints well. It was easy to set up the printer and wireless printing from a couple of computers. It uses ink cartridges. While Epson goes to great lengths to advertise/tout its cartridge-free printer models, if you don't print a lot this unit will do fine for you. Did I mention that it's relatively cheap? Has a fax function, but I don't have a landline anymore. It is a bit tall, and you have to open the scanner to access the ink cartridges; so beware if you're putting it in a cabinet or shelf without some decent head room.
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Reviewed in the United States on May 27, 2026
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Dave Goodwin
Carnegie, US
★★★★★ 5
Good Printer
Style: WF-3820
Given the 'not so good' reviews, I was a little apprehensive to buy this printer at first. This replaces a WF3620, in which I was very happy with its performance. But the print head began to print only Yellow and Black, and several attempts to 'unclog' the Cyan and Magenta nossles proved unsuccessful. But, I am very happy with the WF3820 - both with the price and the performance. It is faster and the graphics are clear and sharp. The 'jury' is still out on how much toner it uses, but suspect it is around the same as with the WF3620. If so, then I will retain my 5 Star rating.
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Reviewed in the United States on August 7, 2023

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