Jump to content


  • Content Count

  • Joined

  • Last visited

About davelin315

  • Rank
    Just Dave
  • Birthday 03/15/1972

Custom Fields

  • Gender
  • Location
    Herndon, VA

Recent Profile Visitors

1,420 profile views
  1. davelin315

    Coral ID

    Angle makes it tough to tell. Definitely an Acropra but hard to tell what species. Can you get a shot of a branch with a profile of the corallites? This is the most telling as each species tends to have a u ique corallite structure amd then you can attempt to distinguihs between similar soecies by growth pattern and coloration.
  2. davelin315

    Hand irritation?

    The winter season could be a contributing factor as DFR said above. Saltwater causes contact dermatitis for me at times (oddly enough, only synthetic saltwater, not NSW so it must be something in the formulas that does it as it has happened with 2 Little Fishies salt and also Instant Ocean which are pretty much the only two I've ever used with any sort of consistency). It is far worse in the winter than in the summer months for me and I typically can expect my skin to crack and bleed if I'm messing around in tanks with any regularity. Dermatitis can manifest itself in many different ways on different people so the red spots to me would suggest a slight allergic reaction or contact dermatitis (which I think is the same thing?).
  3. davelin315

    Maxima Clam Questions

    Careful, a receded foot is not a great sign. They can pull their foot back into their body but if there is a gaping hole, it's kind of similar to gaping in the mantle and is never a good sign. The mantle coming back out is a good sign but keep a close eye on the snail, are you sure you have no predators in there? Seems kind of bad that the byssal threads tore to me, tridacnids to the best of my knowledge don't often do this and it's more of a factor of something else doing it to them (or at the very least causing them to do it which I would not think a simple snail on the shell would do).
  4. davelin315

    weird thing in tank

    Agree with Treesprite, some sort of limpet. Hard to tell without seeing the shell and the foot which is very clear in the picture. Next time give it a tap and see what the shell looks like when it pulls its foot back under.
  5. davelin315

    New Tank

    I have been kind of sort of out of the hobby since I lost my fish years ago due to velvet (except for collection animals for various projects and tanks at work) but recently picked up a few new fish. Very rare and unusual specimens, not often seen in the marine hobby. What do you think? [emoji6] Sent from my Pixel 2 XL using Tapatalk
  6. davelin315

    Live Aquaria woes

    Guys, this is an ages old discussion/debate on what is appropriate. From a purist perspective, QT is NOT treatment, it is simply observing for an extended period of time to see what comes out. Hospital tanks are then used to treat. Prophylactic treatment is not always good for animals but if you don't treat, you must understand that you are risking some common ailments coming out in your system. Even if you do treat, the ability to get everything out of the fish is slim to none as treatments to remove every single pathogen are non-existent and you have to use a cocktail to get the most of them out of there. As Rob and others mentioned, 2 weeks is not enough time to properly QT, let alone treat, a fish, but you get what you pay for. Even 2 weeks in copper as people have suggested is insufficient for all ailments and for some fish, is not possible to do as heavy metals do more harm than good for some. In the end, your best bet is to QT for observation and see if anything comes out. If you QT for 6-8 weeks you in theory should see most pathogens surface and if you QT in hyposalinity, even better. In the public aquarium realm there are many protocols that call for 90 days of QT for EVERYTHING including rock, clean up crew, etc. If it's biological, it needs to go through QT, even some feeders, although that is skipped in some cases since their life cycle is not even 90 days long.
  7. davelin315

    any good algae feeder?

    I bought some of the plastic hangers with clips on them and then glued them to an old mag float. Works great and if you need to retrieve the magnet, it floats up to the top. You can also slide it wherever you want it in the tank so I used to use it to feed my conchs, too. I stripped the scraper portion off of it to make it move more smoothly along the glass. I still have a couple of these at the house, I think I made them 10 years ago and they are still working today.
  8. davelin315

    Filtration Thoughts

    RO would definitely filter all of that out as the pores in the various filters are absolutely tiny. You should not be getting much above .0001 micron particulate matter unless it is from the DI resin itself as the RO membrane filters to .0001 micron.
  9. davelin315

    Filtration Thoughts

  10. davelin315

    Filtration Thoughts

    Actually, Paul, I brought up the microplastics because lately I have seen studies that show fish dying off because of impaction in their digestive systems that is almost wholely plastic. It's a gradual buildup and seems to be similar to what is experienced with heavy metals like mercury. Not sure how accurate these studies are but they are out there.
  11. davelin315

    Cheap LEDs

    Thanks everyone, ReefAddict (who I found out I played against in hockey about 12 hours before I picked up the light and who scored the winning goal against my team!) lent me his lights.
  12. davelin315

    Filtration Thoughts

    I have been thinking a lot about filtration lately and there were some topics I wanted to bring up for thoughtful discussion. First, an interesting side note to the carbon discussion in another post, I recently toured a metropolitan water facility for producing drinking water and in their sand filters the industry standard seems to be to use activated carbon as the top layer and then to leave it in place for 10-15 years with constant backwashing. I asked about the useful life for the carbon as I knew it would be exhausted very quickly and they said that its abilities to remove impurities was not the driving factor behind its use but that its porosity and micro structure allowed for it to be a superior source of biological filtration over just about anything else. They felt that it would not release anything once it was tapped out in terms of removal of impurities and that this would instead allow for it to be a far more effective filter overall. By the way, this is apparently how all of the drinking water for Fairfax and Loudoun Counties is produced, including at the new Loudoun facility being built right now. This has made me curious as to whether very gently tumbled carbon (or at least carbon that is receiving mechanically "pure" water exposure) could be a great biological filter even after its useful life as a chemical filter is exhausted. The second one is on mechanical filtration of water in our systems and how it affects longevity of our animals. I was following a FB post by someone using the the new CoralVue (I think) Klir filter system and the use of fleece or whatever material it incorporates on its rolls to replace filter socks and it got me thinking - do we introduce a lot of microplastics into our systems through the use of various filter materials? If we do, and a brief analysis of what can produce microplastics against what we use in our tanks leads me to assume that we do, how does this affect the life in our tanks? There are obvious things that do not occur in our systems that would reduce the ingestion of these plastics by our animals such as a lack of predation up to an apex predator and the lack of floating plastic garbage in our tanks, but if we are possibly introducing microplastics into our systems through the use of plastic equipment in circulation and filtration are we shortening the lives of our animals? Could it be that some of the mysterious deaths of what appear to be healthy animals over time might be attributed to ingestion of microplastics? Curious about this one and don't feel that I have a ready assumption as to whether this is actually a problem or not. Wondering if anyone has the ability to microanalyze tank water for the presence of microplastics across a large sample...
  13. davelin315

    Cheap LEDs

    ReefAddict, can you send me an email with details on your lights? I put out some feelers on donations from some of the bigger companies but that typically ends up with just that, feelers. If you are willing to loan out your lights that would be fantastic! davelin@childsci.org or info@novaquarium.org would be the best emails to send info to.
  14. davelin315

    Cheap LEDs

    I actually have a bunch of bulbs for these I think, just looking for something that they don't need to put together themselves at the school. She said she's got some friends who are into woodworking and they have a shop there but it's not open until school is open.
  15. davelin315

    Cheap LEDs

    Just not sure which ones actually work well. We are currently going to use the T5s as long as they still work - I think I have some new bulbs that we can add to it and it can give consistent lighting across two 20 gallon tanks so that we remove some of the inconsistencies but might be easier in the end to use 2 ready made LEDs versus retrofitting these. Eric, any chance you have 2 of the same fixtures to avoid any inconsistencies between the two tanks?