It has been over 20 months since I last posted about my Cornish native aquarium, so high time for a quick update with a few iPhone pics. In short, everything has ticked along nicely and nothing major has happened. Grey Top shells keep the glass pretty free of algae, I do not think I have ever had to clean the tank myself this year. I tried to keep a small piece of Dead Mans’ Fingers but it unfortunately perished. I think this mainly had to do that I was not able to attached it to the rock (using elastic bands). If I could get my hands on a piece already attached to a rock I think it would work.
My main goals is to keep some new species of anemone, and I will try to find some soon when diving. Currently, I still have the Daisy-, Dahlia-, Beadlet-, Strawberry-, Red Speckled- (see pic above) and Snakelocks Anemones. The Beadlets are producing lots of babies, some of which already have grown up to half the size of adults. I have each of the two Snakelocks colour morphs and both anemones have divided in two and grown quite a bit (see pic below). There are at least ten other species I could collect, and it would be great to have a whole collection. Anemones are generally easy to keep and very pretty! I feed them a few times a week with frozen foods such as artemia and I also handfeed them with bits of defrosted shrimp.
My Cornish Suckers (a species of clingfish) are still in there, but I only see them when feeding. I am reluctant to add more fish, as the tank has become a bit of a death trap with all the anemones! I have a common starfish, a few cushion starfish, some netted dogwhelks and a sea urchin. I will add some small prawns again as well since they are quite beautful and always on the move (and if they end up as anemone food, well, that is fine too). Occasionally, I add a random find to the tank, see below a colonial seasquirt on a shell I found on the beach and a shell with some Seabeard hydroids (Nemertesia antennina) attached that I picked up during a dive.
Hardware-wise, I am very happy with the Red Sea Reefer 170 and my AI Prime LED light. The LEDs are operating at very low capacity though, I use less than 10% of the output I think. I use a skimmer, but do not have biological filtration in the sump and rely solely on the gravel in the tank. I have a separate chiller loop going in and out of the sump. The tank currently is kept at 16C, which is not supercold for a coldwater tank, but it avoids problems with condensation (and saves some energy). My water changes involve a walk to the quay at the end of my street with two 10L jerry cans. I try to do a water change once a week but I do not always succeed. So hopefully I will be able to add some interesting species to the tank soon. Finally, watch this space for some very interesting coldwater aquarium news early next year…..
P.S. click on the ‘Aquarium Update’ tag on top to see all old posts on my aquarium
I replaced my old Red Sea Max 130D tank last December with a new Red Sea Reefer 170 tank. I was not entirely happy with the design of the old tank (see this old post) and I was thinking of a new aquarium with a sump, and then my retrofitted LEDs stopped working: I was practically forced to buy a new aquarium! It is much better to have a sump to have a large skimmer in, the glass is much clearer and the (separately bought) AI prime LEDs are great (with seven different individually adjustable colours). I had a long day switching tanks and found three clingfish alive and well. I released my ballan wrasse as it was before the christmas break and I did not want to let it go two weeks without food. In the following weeks, I managed to collect some more anemones, I now have Snakelocks, Strawberries, Beadlets, Daisies, Redspeckleds and Dahlias. It is my aim to collect maybe ten or so more species this year when rockpooling and diving and turn it into a proper anemone tank. I probably won’t add any fish or big inverts as they could fall prey to the anemones. I have added some snails to help keep the algae under control, unfortunately after a a superclean first two months some green hues are starting to appear so I will add some more. These are two hasty shots; a proper update is soon to follow!
I started this blog mainly to document keeping a temperate marine aquarium; browsing back I see that that was more than four years back already! (see this introduction). Over time, I became more passionate about rock pooling, snorkeling and diving, specifically about seaweeds and photography, and blogged less and less about my aquarium. The aquarium had its ups and downs, as coldwater aquariums tend to be a bit more trial and error (coldwater marine aquariums do not consist of relatively slow growing stony corals as in tropical marine aquariums and house much more (higher order) diversity than tropical or cold freshwater aquariums). Also, I am a lazy man. The last aquarium update was from last November and the aquarium did not look that great, but I have lately spend more time on it and it looks much better now, so here a quick new post.I bought an upgrade Red Sea Max pump (much better) a while back, and more recently a Tunze 9001 skimmer (MUCH better than the stock skimmer, removed years ago as it was so noisy). The only problem is that the pump is so powerful that the water does not get sucked fast enough in the back compartment and it starts to run dry, I need to think how to fix that. The water is very clear though. I only have Cornish suckers as fish at the moment, and it might not be safe to add other fish as there are quite a few anemones at the moment. I have collected a bunch of Daisy anemones Cereus pedunculatus whilst diving (these are very common here in Flushing). I feed all my anemones small pieces of defrosted prawn by hand, these little ones respond very well to that and I hope they will grow much larger. I also collected some more Redspeckled anemones Anthopleura balli(below). David Fenwick kindly gave me an oyster with many Jewel anemones Corynactis viridis attached (crappy pic, sorry). These did relatively well for a while when feeding fine dry foods (sold for reef aquariums) but they were bothered by the squat lobster and cushion stars and I put the oyster back in the sea (I was also worried the oyster might die and cause a huge nitrogen spike). As an experiment I removed a few jewel anemones with a scalpel and superglued them to frag plugs but they did not survive. Ah well, that might have been a first, so worth a try. With a smaller, dedicated aquarium with better filtration (to deal with many small food particles) it must be doable to keep these. At the moment there are several species of gastropods, a cute little clam, mussels, Snakelocks- Dahlia-, Beadlet- and Strawberry anemones, a small Hairy crab, Cushion stars, green urchins and a Common starfish. The echinoderms seem easiest to keep of all. I actually put the common starfish back as it was picking of all my snails which I need to keep algae in check (and are interesting in their own right of course). I added a Cushion starfish with six legs though (‘Dave’). Hopefully I can find some more anemones when diving over the summer and who knows experiment with seaweeds again.
Mevagissey is a nice little fishing port to the east of Falmouth, across the Roseland Peninsula. It also can boast of an aquarium, which of course needed to be checked out! The Mevagissey Aquarium is housed in the old R.N.L.I. Boathouse and so it is tiny. No coffee/gift shop or educational posters but just some tanks with local fish; just the way I like it.There are just seven tanks, but they are quite big. The focus is on fish, with crabs, lobsters and starfish as the only invertebrates (probably because the aquarium is supported by the fishing community and that is what they know best). Large Seabass and Mullet:
The tanks are not the prettiest in the world; a lot of blue paint and haphazard rocks. I have no idea why somebody thought that plastic plants and wood were a good idea for decoration. It would be nice to also have included some different habitats and (smaller) organisms. Having said that, the tanks are impressive in size and harbour quite a range of different fish, which all seemed well cared for. I should also mention that entrance is free, which is great, and donations alone will of course not be sufficient to cover fancy LED lighting etc. All in all highly recommended for a visit when you are in the area, which by the way is pretty stunning. Below a Ling and some Boarfish (or Zulufish, a deeper water species, see here for more info):
After having the aquarium almost empty over summer, I finally got round to start it up again. I reinstalled the Tunze nanostream, went back from the finer, brown Maerl gravel to normal, coarse gravel and collected some new rocks (slate I think). I looked for these on the middle shore; on the lower shore they are covered with the barnacles and limpets that I do not want and on the high shore they have not yet been eroded by water and have very sharp edges. Still have to get used to the new look. Now on to collect some animals!