more seaweeds

I had to remove the False eyelash weed from the aquarium; some bits were looking fine but in general a substantial amount of the branches had died off. Perhaps this is what normally happens in nature, only in rock pools any dead material is quickly washed away and so it goes unnoticed. I had to make some water changes to get rid of the debris which required some healthy exercise bringing buckets of waters down from the quay. Although it was windy and cold, I could not resist the urge to have a look at my local beach in Flushing last Saturday, hunting for some more seaweeds. It was noticeable that one particular seaweed had started to grow everywhere: Dumont’s tubular weed Dumontia contorta:

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Slightly slimy and impossible to remove from the rock without ending up with a hand of loose strands. I therefore have placed a large pebble with one small plant in the aquarium just to see how it goes. I found small plants of Solier’s red string weed Soliera chordalis again that did well in the aquarium last year, as well as a whole bunch of other red seaweeds that I have trouble to identify (not the first one, that is Bunny ears Lomentaria articulata):

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To test whether they are able to grow in the aquarium, I have placed them in an old floating fish fry box I had lying around:

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first attempts at aquascaping

I am not sure if I like the term aquascaping much because of it’s connotations with gardening and I like a more natural look. However, aquascaping is the general term for arranging plants in an aquarium nowadays and that is what I attempt to do as well with seaweeds. (Also, I cannot pretend that my tank looks particularly like a real rock pool…). Anyway, I will post some more thoughts on the topic of aquascaping, marine or fresh water, later but for now just wanted to show some of the first attempts at planting my aquarium, It is challenging to make any tank look ‘right’, but I found it particularly hard to recreate a rock pool feel. I soon found out that I did not have enough rock in the tank and so hauled some *heavy* ones from a nearby beach. The bare tank:IMG_0551

Some wrack added (I cannot remember what species and cannot tell from the picture, it did well though). A strawberry anemone Actinia fragacea on the right.IMG_0593

Another version with Serrated wrack Fucus serratus (left), a small mop of Dudresnay’s whorled weed Dudresnaya vertillicata (far left) and some Solier’s red string weed Soliera chordalis (middle and right). A bit messy:IMG_0362

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A worm pipefish, dog whelk and hermit crab in front of the serrated wrack. There is a lot of algal growth and detritus on the wrack. (I have since bought a circulation pump to keep detritus in suspension so it can go into the filter, more about that later).IMG_1285Another go. The nice thing about having an aquarium with native species is that you can collect them yourself, which is half the fun (and free), and when something does not work out you just chuck it back and try something else.  The green seaweed is velvet horn Codium tomentosum, the long brown seaweed is wireweed Sargassum muticum. Both did well, the wireweed grew quite fast, perhaps not a surprise as it is an invasive species in the UK. The red seaweed on the left is dulse Palmaria palmata, on the right harpoonweed Asparagopsis armata. The harpoonweed was not exactly thriving and the dulse was quickly eaten by the prawns:IMG_1319IMG_1701Recently, I noticed the Dudresnay’s whorled weed (love that name) sprouting from the rocks everywhere. This happened some months after removing a pluck of this weed from the aquarium. Up till then I had just planted seaweeds, but having them establish spontaneously I had not seen before. Most of the newly established weeds are only a couple of centimeters and do not seem to grow very fast, but the two weeds pictured above grew to 10 centimeters in a couple of weeks. Perhaps very local conditions in the aquarium matter.

introduction

Hello! For the last half year or so, I have been messing with a marine aquarium housing sea weeds and critters collected from local rock pools here in Cornwall. I thought it would be fun to blog about my aquarium project, especially after I discovered that it is quite easy to take nice aquarium pictures using an iPhone (which I found nearly impossible using a standard digital camera). After doing some internet research, I settled on a Red Sea Max 130D ‘plug-and-play’ aquarium (I will post about the actual tank later). I could not find much information on the web on temperate marine tanks, especially ones without a chiller or a sump. and few of those seem to focus on seaweeds. So who knows I may have found a niche. Below I have posted some pictures from when I was setting it up last year:

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Half a bucket of gravel collected from a nearby beach, RO water taken home from the lab where I work (carried back 2×10 L at the time, the tank is 130 L) mixed with a free bucket of sea salt that came with the tank. Few sea weeds and not too many rocks. I have since replaced the rocks with bigger ones; most critters are benthic and you do not want to have too much ‘open water’ around with nothing in it. Although too bare, I do like the purple look of this set-up, which has since disappeared because of inevitable algae taking over from the purple crustose seaweeds.

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A shanny Lipophrys pholis, this is a very common fish around here that can easily be picked up when turning stones at low tide. The branched seaweed on the left is Solier’s red string weed Solieria chordalis; in the back on the right there is a little pluck of Berry wart cress Sphaerococcus coronopifolius.

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A snakelocks anemone Anemonia viridis. Behind it some Slender-beaded coral weed Jania rubens. This weed died off quite quickly; first it turned a bright orange, then white.

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The Star ascidian Botryllus schlosseri, a colony-forming tunicate. It did not survive for too long, but that might just have been because the particular broad-leaved red seaweed they grew on are very popular with prawns and hermit crabs. What animals and sea weeds do well has been trial and error. I might compile a list of ‘easy’ species and ones to avoid at some point.