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Everything posted by Timfish

  1. Timfish

    BBMarlin's 76G - Skimmerless SPS Reef

    Looking good! 👍 I don't know if you've read Rohwer's "Coral Reefs in the Microbial Seas" but this negative feedback loop you've described with algae and coral is central to his DDAM model of reef degradation. Something disrupts corals or the primary herbivores are lost and algae is able to take over by out competing corals and dumping bad types of DOC into the water which further stress corals. All those sponges you have help stabilize the ecosystem by removing all types of labile DOC much faster than anything else can. (Sponges remove in 20-30 minutes what bacteria take 3 weeks to remove.) And water changes are still the only way to remove the refractory DOC in our systems.
  2. Timfish

    Melanurus Wrasse Gill Swollen?

    It might be a growth or a rock/shell stuck in it gill or maybe a large parasitic isopod. Only way to know for sure is going to be catch it, hold it gently in a wet towel (aquarium water) and examine it.
  3. Timfish

    Pink sponge ID

    Congradulations on training your flasher wrasse! Are you going to do a training video? Do you use voice or visual commands or both? My guess on the sponge is it's one of the Haliclona species tube sponge
  4. No, you didn't misunderstand me. I maintain the first two systems in my post with just tapwater and dechlorinator (Austin has pretty decent tapwater). No RO or RO/DI filter is used. (No skimmer, dosers, reactors or refugiums either.) New saltwater is made up at the time of water change and allowed to sit however long it takes to siphon out some water.
  5. When calculating the life expectancy of the GAC filter cartridges it's best to periodicly measure the actual ratio of "waste water" to filtrate. Not all RO membranes are the same and water pressure can vary by a surprising amount so the amount of rejected water to filtered water can be much higher than 3:1. In my maintenance business I use 3 stage RO, 5 stage RO/DI and just plain tapwater treated with dechlorinator (Ammo Detox) and haven't seen any difference. When troubleshooting reef problems old filters are often pointed to as a cause and they may be if they are letting chlorine get into the system but in my experience maintaining systems with tapwater I would look someplace else for the problem. Here's the two systems I've been maintaining with tapwater treated with dechlorinator: And here's a system maintained with a water softener then GAC filters (no dechlorinator):
  6. No point in me playing the lottery anymore ! Found this baby clam in the sump of one of my tanks stuck to some eggcrate. Clam wasn't there 6 - 8 months ago and only inverts added in the last three years have been a GBTA 2 years ago and a couple of starfish three years ago. First two pictures are of the baby clam the third is of the parents. Parents showed up on some live rock about 10 years ago.
  7. Timfish

    My First Skimmerless System

    This is the first system I set up 19 years ago without a skimmer and thought I'd do a thread on it. For the first post I thought I'd start with a video taken a couple years ago: Recent water parameters: Alkalinity 5-10 dKH pH 7.8 - 8.1 Salinity 1.022 - 1.027 Temp 76 - 78 Nitrate 1 ppm
  8. Timfish

    My First Skimmerless System

    Yes clams reproduce sexually. some species have separate sexes, some are hermaphrodites and some are sequential hermaphrodites. I haven't been able to verify the exact species I have in my tanks but my suspicion is they are hermaphrodites. Tridacna clams are sequential hermaphrodites starting off male and switching to females.
  9. Timfish

    What the . . . what are the odds!

    Well, got three now. 😁
  10. Timfish

    My First Skimmerless System

    Been meaning to post this for a while now. Since the first baby clam showed up in 2012 a couple more have shown up.
  11. Timfish

    Blue/green chromis

    If you want to stay with chromis Vanderbilt's are prettier and hardier.
  12. Timfish

    Blue/green chromis

    Yup, that's what hapens with blue/green chromis. IMO they should only be left to experienced aquarists. A colorful combination of hardy damsels would be a Talboti, Azure, Rolland's and a Yellow Belly. All four are Chrysiptera species, have the same body size and shape and same behavior. They are similar enough they will set up thier own hierarchy and from what I've I wouldn't be surprised to see mating behavior.
  13. Timfish

    Hair Algae with good water?

    For starters I would recommend Forrest Rohwer's "Coral Reefs in the Microbial Seas". It's an excellent introduction to Dissolved Organic Carbon (DOC) and points out whether the equilibrium promotes algae or corals is independent of nutrients. In my two nuisance algae threads on this forum being patient and using only manual removal nuisance algae disappeared as inorganic nutrients increased. This system is one I think demonstrates the idea that it's the equilibrium that matters and not the amount of nitrate or PO4 per se that matters. Being maintained now for roughly 8 years with tapwater the "gurus" say can't be done. And I have to disagree with the idea sunlight causes nuisance algae problems. The different spectrum may be a challenge for the average hobbyist to know how to stock and deal with initially but the simple techniques I posted in my two algae threads work just as well if sunlight is a source of light. Here's my system that gets seasonal variable of 1\2 to 2 1\2 hours:
  14. Timfish

    LED Choices

    Viperspectra or Mars Aqua are a couple options. Kessils, from what I've seen the last few years, have roughly a 10% failure rate at the 3 year mark but they use glass lenses which won't discolor over time like polycarbonate lenses will.
  15. Timfish


    You might try glass shrimp. They won't live long in saltwater so you'll need to remove any dead ones.
  16. Timfish

    When to add PO4 remover when cycling

    I wouldn't use it while cycling. once a system is mature you might use it if you're feeding a lot and PO4 is climping above .5 mg/l. Keep in mind PO4 defciency can really screw up phototrophs (animals with zooxanthellae).
  17. To add to o0zarkawater's points, diseases and parasites can be passed by contaminated water, rocks, sand and equipment that's not rinsed well or cleaned with fresh water and also can be transmitted with corals that aren't dipped.
  18. Timfish

    42 Gallon Hex Tank Build

    Nice work and excellent detail!
  19. Timfish

    Algae Scrubbers

    Here's another paper showing algal exudates are allelopathic to corals: http://www.pnas.org/content/108/43/17726
  20. Timfish


    My favorite is CaribSea's Fiji Pink but any coral sand with a grain size between .5mm and 1.5mm I would be happy with.
  21. Timfish

    Algae Scrubbers

    Here's what he said ". . . for reasons unclear, the algae has never outgrown the filter and has never had to be removed or harvested, . . ." Here's the link to Palletta's review of Leng Sy's Ecosystem in 1997 Volume 14 Seascope if you want to read his whole article. The .pdf has all four issues so you'll need to scroll through them to get to the summer issue it's in. Here's the best example I have: Initially Calurpa growth was pretty robust and was a fair amount was harvested from the two ~40 gallon refugiums 3 or 4 times the first two years. It was harvested only one more time after that and the last two years even though there was a fair amount that showed some growth with new runners overall there wasn't any significant changes in volume and none was harvested. And here's a video of the system.
  22. Timfish

    Automatic feeders

    Thank you!
  23. Timfish

    Automatic feeders

    The feeding tube creates a venturi effect that sucks the food directly into the return pump intake. You can see a 90° elbow at the bottom with the intake side of it pointed down. This elbow is attached to the intake of the return pump. The slots in the side of the tube are cut at an angle to help crate the venturi or whirlpool swirl that keeps the food from building up on the side of the tube and rotting. The bottom of the tube is sealed with a peice of acrylic so all the water has to go through the slot on the side. The slots I cut with a cordless circular saw held at a bit of an angle but it would be easier I think to cut them on a table saw but I imagine could be made with a 1/4" drill and a small handsaw to connect the drill holes. I have tried dumping food into a sump above or next to a pump intake and a lot of it does not get sucked into the pump. This will end up rotting and can smell pretty bad and using a feeding ring in the sump doesn't prevent it from happening.
  24. Timfish

    Algae Scrubbers

    Not surprised at all. Micheal Palletta back in the mid 90's observed the same thing when looking at Leng Sy's "Ecosystem" method and I've seen the same thing every time I've put macros in a refugium. My guess is you've been seeing a fairly decent coral growth recently (if you haven't completely stripped out PO4). Before you go through the work of installing an ATS I'd suggest you read these papers on the competative and antagonistic roles corals and algae have, for both nutrients and microbial processes: Algae DOC: https://peerj.com/articles/108/?utm_source=TrendMD&utm_campaign=PeerJ_TrendMD_0&utm_medium=TrendMD https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0027973 https://www.nature.com/articles/nmicrobiol201642 Carbon dosing kills coral: https://www.int-res.com/articles/meps2005/294/m294p173.pdf https://www.int-res.com/articles/meps2006/314/m314p119.pdf