venzi Posted September 8, 2022 Share Posted September 8, 2022 Hi. I noticed this mineral deposit or detritus (not sure what it is) on the bottom of the glass. You can't tell from the picture but it is sitting on the glass and not something growing on the UGF plate. Anyone know what it might be? The biggest change I had made to the tank was adding 10 tablespoons of sea salt (that was dissolved in a bowl of water) to my 20H tank. I don't know if the deposit was there before or after the sea salt addition. But this tank is new so I don't think any mulm/detritus would form by that much already. Water temp is 76F and PH 8.2. I had read that adding salt can cause calcium and other minerals to be removed from the water (depending on GH), but I thought that was supposed to happen at the water surface and not at the bottom of the tank. I have a few guesses maybe salt crystals that aren't getting absorbed by the water (but I kinda doubt this b/c I'm pretty sure I can add more salt and it would dissolve) maybe adding the salt somehow flushed all the fine debris (sand) that was in the gravel to the bottom maybe calcium/mineral deposits Link to comment Share on other sites More sharing options...
Guppysnail Posted September 8, 2022 Share Posted September 8, 2022 It’s detritus or mulm and nothing to worry about. I have a tank I did not have the airstone up high enough and it collected gobs of it under the filter plate. It has never hurt anything. 2 1 Link to comment Share on other sites More sharing options...
Beardedbillygoat1975 Posted September 8, 2022 Share Posted September 8, 2022 Agreed. If your parameters are on point nothing to worry about. 1 Link to comment Share on other sites More sharing options...
rockfisher Posted September 8, 2022 Share Posted September 8, 2022 (edited) I agree. If you look close there are a few detritus worms there. It’s a good thing, don’t be worried Edited September 8, 2022 by rockfisher 1 Link to comment Share on other sites More sharing options...
venzi Posted September 8, 2022 Author Share Posted September 8, 2022 Ok whew. Thanks for responding. What kind of change could I expect as time progresses? Will this turn into a flat layer of detritus or will it stay as these tiny clumps? Will it eventually disappear as my tank matures? Link to comment Share on other sites More sharing options...
Guppysnail Posted September 8, 2022 Share Posted September 8, 2022 Mine builds up a bit but still nothing I worry over. 1 Link to comment Share on other sites More sharing options...
venzi Posted September 8, 2022 Author Share Posted September 8, 2022 On 9/8/2022 at 1:57 PM, Guppysnail said: Mine builds up a bit but still nothing I worry over. Ok cool. My main concern is over impeded flow over time, but the detritus is evenly distributed so I guess it'll be fine unless I somehow get like a thick layer of it. Link to comment Share on other sites More sharing options...
Guppysnail Posted September 8, 2022 Share Posted September 8, 2022 They say every few years you have to clean under it. If you vac well weekly it should be many years before it builds enough to be an issue. 1 Link to comment Share on other sites More sharing options...
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